diff --git a/Nim/NimQml/NimQml.nim b/Nim/NimQml/NimQml.nim
index 581b899..9c008ea 100644
--- a/Nim/NimQml/NimQml.nim
+++ b/Nim/NimQml/NimQml.nim
@@ -22,6 +22,8 @@ type QMetaType* {.pure.} = enum ## \
   QVariant = cint(41), 
   Void = cint(43)
 
+var qobjectRegistry = initTable[ptr QObjectObj, QObject]()
+
 proc debugMsg(message: string) = 
   echo "NimQml: ", message
 
@@ -88,11 +90,11 @@ proc intVal*(variant: QVariant): int =
   ## Return the QVariant value as int
   var rawValue: cint
   dos_qvariant_toInt(variant, rawValue)
-  result = cast[int](rawValue)
+  result = rawValue.cint
 
 proc `intVal=`*(variant: QVariant, value: int) = 
   ## Sets the QVariant value int value
-  var rawValue = cast[cint](value)
+  var rawValue = value.cint
   dos_qvariant_setInt(variant, rawValue)
 
 proc boolVal*(variant: QVariant): bool = 
@@ -177,9 +179,9 @@ proc toCIntSeq(metaTypes: openarray[QMetaType]): seq[cint] =
   for metaType in metaTypes:
     result.add(cint(metaType))
 
-type QObjectCallBack = proc(nimobject: ptr QObject, slotName: QVariant, numArguments: cint, arguments: QVariantArrayPtr) {.cdecl.}
+type QObjectCallBack = proc(nimobject: ptr QObjectObj, slotName: QVariant, numArguments: cint, arguments: QVariantArrayPtr) {.cdecl.}
     
-proc dos_qobject_create(qobject: var DynamicQObject, nimobject: ptr QObject, qobjectCallback: QObjectCallBack) {.cdecl, dynlib:"libDOtherSide.so", importc.}
+proc dos_qobject_create(qobject: var DynamicQObject, nimobject: ptr QObjectObj, qobjectCallback: QObjectCallBack) {.cdecl, dynlib:"libDOtherSide.so", importc.}
 proc dos_qobject_delete(qobject: DynamicQObject) {.cdecl, dynlib:"libDOtherSide.so", importc.}
 proc dos_qobject_slot_create(qobject: DynamicQObject, slotName: cstring, argumentsCount: cint, argumentsMetaTypes: ptr cint, slotIndex: var cint) {.cdecl, dynlib:"libDOtherSide.so", importc.}
 proc dos_qobject_signal_create(qobject: DynamicQObject, signalName: cstring, argumentsCount: cint, argumentsMetaTypes: ptr cint, signalIndex: var cint) {.cdecl, dynlib:"libDOtherSide.so", importc.}
@@ -191,58 +193,63 @@ method onSlotCalled*(nimobject: QObject, slotName: string, args: openarray[QVari
   ## Subclasses can override the given method for handling the slot call
   discard()
 
-proc qobjectCallback(nimobject: ptr QObject, slotName: QVariant, numArguments: cint, arguments: QVariantArrayPtr) {.cdecl, exportc.} =
+proc qobjectCallback(nimobject: ptr QObjectObj, slotName: QVariant, numArguments: cint, arguments: QVariantArrayPtr) {.cdecl, exportc.} =
+  let qobject = qobjectRegistry[nimobject]
+  assert qobject != nil, "expecting valid QObject"
   # forward to the QObject subtype instance
-  nimobject[].onSlotCalled(slotName.stringVal, arguments.toVariantSeq(numArguments))
+  qobject.onSlotCalled(slotName.stringVal, arguments.toVariantSeq(numArguments))
 
-proc create*(qobject: var QObject) =
+proc create*(qobject: QObject) =
   ## Create a new QObject
+  let internalRef = qobject
+  let qobjectPtr = addr(qobject[])
+  qobjectRegistry[qobjectPtr] = internalRef
   qobject.name = "QObject"
   qobject.slots = initTable[string,cint]()
   qobject.signals = initTable[string, cint]()
-  dos_qobject_create(qobject.data, addr(qobject), qobjectCallback)
+  dos_qobject_create(qobject.data, qobjectPtr, qobjectCallback)
 
 proc delete*(qobject: QObject) = 
   ## Delete the given QObject
+  let qobjectPtr = addr(qobject[])
+  qobjectRegistry.del qobjectPtr
   dos_qobject_delete(qobject.data)
 
-proc registerSlot*(qobject: var QObject, 
+proc registerSlot*(qobject: QObject,
                    slotName: string, 
                    metaTypes: openarray[QMetaType]) =
   ## Register a slot in the QObject with the given name and signature
   # Copy the metatypes array
   var copy = toCIntSeq(metatypes)
   var index: cint 
-  dos_qobject_slot_create(qobject.data, slotName, cint(copy.len), cast[ptr cint](addr(copy[0])), index)
+  dos_qobject_slot_create(qobject.data, slotName, cint(copy.len), addr(copy[0].cint), index)
   qobject.slots[slotName] = index
 
-proc registerSignal*(qobject: var QObject, 
+proc registerSignal*(qobject: QObject,
                      signalName: string, 
                      metatypes: openarray[QMetaType]) =
   ## Register a signal in the QObject with the given name and signature
   var index: cint 
   if metatypes.len > 0:
     var copy = toCIntSeq(metatypes)
-    dos_qobject_signal_create(qobject.data, signalName, cast[cint](copy.len), cast[ptr cint](addr(copy[0])), index)
+    dos_qobject_signal_create(qobject.data, signalName, copy.len.cint, addr(copy[0].cint), index)
   else:
-    dos_qobject_signal_create(qobject.data, signalName, 0, cast[ptr cint](0), index)
+    dos_qobject_signal_create(qobject.data, signalName, 0, nil, index)
   qobject.signals[signalName] = index
 
-proc registerProperty*(qobject: var QObject, 
+proc registerProperty*(qobject: QObject,
                        propertyName: string, 
                        propertyType: QMetaType, 
                        readSlot: string, 
                        writeSlot: string, 
                        notifySignal: string) =
   ## Register a property in the QObject with the given name and type.
-  dos_qobject_property_create(qobject.data, propertyName, cast[cint](propertyType), readSlot, writeSlot, notifySignal)
+  dos_qobject_property_create(qobject.data, propertyName, propertyType.cint, readSlot, writeSlot, notifySignal)
 
 proc emit*(qobject: QObject, signalName: string, args: openarray[QVariant] = []) =
   ## Emit the signal with the given name and values
   if args.len > 0: 
-    var copy: seq[QVariant]
-    for i in 0..args.len-1:
-      copy.add(args[i])
+    var copy = @args
     dos_qobject_signal_emit(qobject.data, signalName, args.len.cint, addr(copy[0]))
   else:
     dos_qobject_signal_emit(qobject.data, signalName, 0, nil)
@@ -275,5 +282,3 @@ proc delete(view: QQuickView) =
   ## Delete the given QQuickView
   dos_qquickview_delete(view)
 
-
-
diff --git a/Nim/NimQml/NimQmlTypes.nim b/Nim/NimQml/NimQmlTypes.nim
index 718bb44..ccba20d 100644
--- a/Nim/NimQml/NimQmlTypes.nim
+++ b/Nim/NimQml/NimQmlTypes.nim
@@ -7,10 +7,11 @@ type
   QApplication* = distinct pointer ## A QApplication
   DynamicQObject* = distinct pointer
     ## internal representation of a QObject, as recognised by DOtherSide
-  QObject* {.inheritable.} = ref object of RootObj ## A QObject
+  QObjectObj* = object of RootObj ## A QObject
     name*: string
     data*: DynamicQObject
     slots*: Table[string, cint]
     signals*: Table[string, cint]
     properties*: Table[string, cint]
+  QObject* = ref QObjectObj
   QQuickView* = distinct pointer ## A QQuickView