diff --git a/NIGHTLY_CHANGELOG.md b/NIGHTLY_CHANGELOG.md
index 492b142..9055ef9 100644
--- a/NIGHTLY_CHANGELOG.md
+++ b/NIGHTLY_CHANGELOG.md
@@ -1,4 +1,7 @@
 ## Changes in this build
 
-- Fix: wrong filament slot used in multicolor prints when T0 is unused — AMS box mapping now includes placeholder entries for all paint indices so the printer correctly matches T1/T2/T3 tool changes to the right slots (Issue #78)
-- Fix: Spoolman spool-slot assignment now persisted to config.ini and restored on bridge restart
+- Fix: Spoolman spool-slot assignment persistence was silently broken (NameError on config_loader swallowed by bare except) — now uses correct module reference and logs failures; per-printer isolation added so multi-printer setups no longer overwrite each other (Issue #80, PR #83 by @walterioo)
+- Fix: spool dropdown in print dialog showed "[object Object]" instead of vendor name (PR #83)
+- Fix: gate_spool_id in MMU object now populated from per-printer slot map instead of hardcoded -1 (PR #83)
+- Fix: PLA variants (PLA+, PLA Silk, PLA Matte) now recognized as their material family — correct tray_info_idx sent to printer, correct Generic profile synced to OrcaSlicer, and vendor profiles for the variant shown in slot editor dropdown (Issue #82)
+- UI: PLA+, PLA Silk and PLA Matte buttons added to slot material selector
diff --git a/kobrax_moonraker_bridge.py b/kobrax_moonraker_bridge.py
index 2deb518..c08fe00 100644
--- a/kobrax_moonraker_bridge.py
+++ b/kobrax_moonraker_bridge.py
@@ -1855,23 +1855,55 @@ class KobraXBridge:
     # `compatible_printers: []` (= mit allen Druckern kompatibel).
     _TRAY_INFO_IDX = {
         # Anycubic-eigene Kobra-X-Profile
-        "PLA":      "GFPLA",
-        "PLA+":     "GFPLA+",
-        "PLA SILK": "GFPLA Silk",
-        "PETG":     "GFPETG",
-        "ABS":      "GFABS",
-        "ASA":      "GFASA",
-        "TPU":      "GFTPU 95A",
-        "PVA":      "GFPVA",
+        "PLA":        "GFPLA",
+        "PLA+":       "GFPLA+",
+        "PLA SILK":   "GFPLA Silk",
+        "PLA-SILK":   "GFPLA Silk",
+        "PLASILK":    "GFPLA Silk",
+        "SILK PLA":   "GFPLA Silk",
+        "PLA MATTE":  "GFPLA",
+        "PLA-MATTE":  "GFPLA",
+        "PLA MARBLE": "GFPLA",
+        "PLA WOOD":   "GFPLA",
+        "PETG":       "GFPETG",
+        "PETG+":      "GFPETG",
+        "ABS":        "GFABS",
+        "ASA":        "GFASA",
+        "TPU":        "GFTPU 95A",
+        "TPE":        "GFTPU 95A",
+        "PVA":        "GFPVA",
         # Kein Anycubic-Kobra-X-Profil → Library-Fallback
-        "PLA-CF":   "OGFL98",
-        "PETG-CF":  "OGFG98",
-        "PA":       "OGFN99",
-        "PA-CF":    "OGFN98",
-        "PC":       "OGFC99",
-        "HIPS":     "OGFS98",
+        "PLA-CF":     "OGFL98",
+        "PLA CF":     "OGFL98",
+        "PETG-CF":    "OGFG98",
+        "PETG CF":    "OGFG98",
+        "PA":         "OGFN99",
+        "PA-CF":      "OGFN98",
+        "PA CF":      "OGFN98",
+        "PC":         "OGFC99",
+        "HIPS":       "OGFS98",
     }
 
+    # Normalisiert Material-Typ-Strings auf den kanonischen Key für _TRAY_INFO_IDX
+    # und _default_filament_name. PLA-Varianten die nicht exakt matchen fallen
+    # auf ihre Basisfamilie zurück (PLA+ → PLA+, PLA Matte → PLA, etc.).
+    @staticmethod
+    def _normalize_material(mat: str) -> str:
+        m = mat.upper().strip().replace("-", " ").replace("_", " ")
+        # Bekannte Varianten normalisieren
+        _ALIASES = {
+            "PLAPLUS": "PLA+", "PLA PLUS": "PLA+",
+            "SILK PLA": "PLA SILK", "PLASILK": "PLA SILK",
+            "PLA MATTE": "PLA MATTE", "PLA MARBLE": "PLA MARBLE",
+            "PLA WOOD": "PLA WOOD",
+            "TPE": "TPU",
+            "PETG PLUS": "PETG+",
+            "PA6": "PA", "PA12": "PA", "PA66": "PA",
+        }
+        if m in _ALIASES:
+            return _ALIASES[m]
+        return m
+
     def _build_lane_data(self) -> dict:
       """Baut BBL-AMS-JSON für OrcaSlicer DevFilaSystemParser::ParseV1_0.
 
@@ -1910,7 +1942,7 @@ class KobraXBridge:
               color_hex = color_raw[:6].upper() + "FF"
             else:
               color_hex = "FFFFFFFF"
-            material = slot.get("type", "PLA").upper()
+            material = self._normalize_material(slot.get("type", "PLA"))
             # User-Override aus config.ini [filament_profiles].slot_N_id
             # bekommt Vorrang vor dem Default-Mapping nach material-Type.
             # Vendor wird mitgesendet (tray_sub_brands + filament_vendor),
@@ -2086,7 +2118,7 @@ class KobraXBridge:
       for _global_index, slot in slots:
         occupied = slot.get("status") == 5
         gate_status.append(1 if occupied else 0)
-        material = (slot.get("type") or "PLA").upper() if occupied else ""
+        material = self._normalize_material(slot.get("type") or "PLA") if occupied else ""
         gate_material.append(material)
         c = slot.get("color", [0, 0, 0]) if occupied else [0, 0, 0]
         # Happy Hare erwartet gate_color als RRGGBB OHNE '#' (Klipper-Limitation).
@@ -2136,8 +2168,22 @@ class KobraXBridge:
       kann pro Slot eine konkrete Marke setzen wenn er das will."""
       if not material:
         return ""
-      mat = material.upper().strip()
+      mat = self._normalize_material(material)
       profs = self._load_orca_filaments()
+      # Varianten-Mapping: Drucker meldet z.B. "PLA SILK", OrcaSlicer speichert
+      # alle Varianten unter type=PLA mit dem Variant-Namen im name-Feld.
+      _VARIANT_NAME = {
+          "PLA SILK":   "Generic PLA Silk",
+          "PLA MATTE":  "Generic PLA Matte",
+          "PLA+":       "Generic PLA",
+          "PLA-CF":     "Generic PLA-CF",
+          "PETG-CF":    "Generic PETG-CF",
+      }
+      if mat in _VARIANT_NAME:
+          target = _VARIANT_NAME[mat]
+          for p in profs:
+              if p.get("vendor") == "Generic" and p.get("name") == target:
+                  return p["name"]
       def _match_type(p: dict) -> bool:
         pt = (p.get("type") or "").upper()
         return pt == mat or pt.startswith(mat + "-") or pt.startswith(mat + " ")
diff --git a/web/themes/default/app.js b/web/themes/default/app.js
index 6f80ba4..696c1bc 100644
--- a/web/themes/default/app.js
+++ b/web/themes/default/app.js
@@ -1413,7 +1413,14 @@ function doProfileImportUpload(files){
 // ── AMS Slot Edit ──
 var _slotEditIndex=-1;
 var _slotEditLoaded=false;
-var _MAT_PRESETS=['PLA','PETG','ABS','ASA','TPU','PA','PC','HIPS'];
+var _MAT_PRESETS=['PLA','PLA+','PLA SILK','PLA MATTE','PETG','ABS','ASA','TPU','PA','PC','HIPS'];
+function _normalizeMat(m){
+  var s=m.toUpperCase().trim().replace(/-/g,' ').replace(/_/g,' ');
+  var aliases={'PLAPLUS':'PLA+','PLA PLUS':'PLA+','SILK PLA':'PLA SILK','PLASILK':'PLA SILK',
+    'PLA MATTE':'PLA','PLA MARBLE':'PLA','PLA WOOD':'PLA','TPE':'TPU',
+    'PETG PLUS':'PETG+','PA6':'PA','PA12':'PA','PA66':'PA'};
+  return aliases[s]||s;
+}
 var _BASE_MATERIAL_TYPES=['PLA','PETG','ABS','ASA','TPU','TPE','PA','PC','HIPS','PEI','PEEK'];
 function updateSlotEditFeedButton(){
   var btn=document.getElementById('btn-slot-edit-feed');
@@ -1454,10 +1461,21 @@ function _fillSlotProfileDropdown(material, currentVendor, currentName){
   _loadOrcaFilaments(function(profiles){
     // Type-Filter: nur Profile vom passenden material zeigen (z.B. PLA → alle PLA-Varianten)
     var matU=(material||'').toUpperCase().trim();
+    // PLA-Varianten: Drucker meldet "PLA SILK"/"PLA+"/"PLA MATTE", OrcaSlicer
+    // speichert alle unter type=PLA — Namens-Keyword als Zusatzfilter.
+    var _PLA_VARIANT_KW={'PLA SILK':'silk','PLA+':'pla+','PLA MATTE':'matte',
+      'PLA MARBLE':'marble','PLA WOOD':'wood'};
+    var variantKw=_PLA_VARIANT_KW[matU]||null;
+    var baseMat=variantKw?'PLA':matU;
     var matched=profiles.filter(function(p){
       var pt=(p.type||'').toUpperCase();
-      // PLA-CF, PLA-SILK etc. zählen auch zu PLA
-      return matU==='' || pt===matU || pt.startsWith(matU+'-') || pt.startsWith(matU+' ');
+      var nameL=(p.name||'').toLowerCase();
+      // Basis-Typ muss passen
+      var typeOk=baseMat===''||pt===baseMat||pt.startsWith(baseMat+'-')||pt.startsWith(baseMat+' ');
+      if(!typeOk) return false;
+      // Bei Variante: Name muss Keyword enthalten (z.B. "silk", "matte", "pla+")
+      if(variantKw) return nameL.indexOf(variantKw)!==-1;
+      return true;
     });
     sel.innerHTML='<option value="">'+tr('slot_edit_profile_default')+'</option>';
     // User-Profile (is_user) zuerst — eigene Optgroup '★ Eigene' an erster Stelle.
@@ -1619,11 +1637,14 @@ function openSlotEdit(i){
   _renderCopyFromSlot(globalIdx);
   var mat=(slot.type||'PLA').toUpperCase();
   document.getElementById('slot-edit-mat').value=mat;
+  // Normalisieren für Button-Highlighting: PLA-Varianten auf nächsten Preset mappen
+  var matNorm=_normalizeMat(mat);
   var btns=document.getElementById('slot-mat-btns');
   btns.innerHTML=_MAT_PRESETS.map(function(m){
+    var active=m===mat||m===matNorm;
     return '<button class="mat-preset-btn" data-mat="'+m+'" onclick="selectMatPreset(\''+m+'\')" '
       +'style="padding:4px 10px;border-radius:6px;border:1px solid var(--border);cursor:pointer;font-size:12px;'
-      +(m===mat?'background:var(--accent);color:#fff':'background:var(--raised);color:var(--txt2)')+'">'+m+'</button>';
+      +(active?'background:var(--accent);color:#fff':'background:var(--raised);color:var(--txt2)')+'">'+m+'</button>';
   }).join('');
   // OrcaSlicer-Profil-Dropdown: aktuellen User-Override für diesen Slot
   // aus /kx/filament/slots holen (enthält vendor+name+id).