@Michael.Navara ,
Thank you for the reply. I chose to SaveCopyAs the part document flat pattern and control the layer visibility so only the outer and inner profiles remain. This makes sure the C-Sink/C-Bore max diameters are removed. I was able to implement within my drawing export tool. It can iterate through all opened documents and batch export.
Sub ExportFlatFromIPT(oDoc As PartDocument, Optional sPath As String = "C:\temp\", Optional sName As String = vbNullString, Optional DwgOrDxf As String = "DXF")
'Get date and time and make filename friendly
Dim strTime As String
strTime = Time
strTime = Replace(strTime, ":", ".")
Dim strDate As String
strDate = Date
strDate = Replace(strDate, "/", ".")
Dim sFilename As String, sNameWExt As String, sFile As String, sOut As String
Dim oDataIO As DataIO
If sName = vbNullString Then
sFilename = oDoc.FullFileName
sNameWExt = Right(sFilename, Len(sFilename) - InStrRev(sFilename, "\"))
sName = Left(sNameWExt, Len(sNameWExt) - 4)
End If
If DwgOrDxf = "DWG" Then
sFile = sPath & sName & " " & strDate & " " & strTime & "_Profile.dwg"
' Get the DataIO object.
Set oDataIO = oDoc.ComponentDefinition.DataIO
' Build the string that defines the format of the DWG file.
sOut = "FLAT PATTERN DWG?" & _
"&AcadVersion=2000" & _
"&InvisibleLayers=IV_TANGENT;IV_ARC_CENTERS;IV_BEND;IV_BEND_DOWN;IV_TOOL_CENTER;IV_TOOL_CENTER_DOWN;IV_FEATURE_PROFILES;" & _
"IV_FEATURE_PROFILES_DOWN;IV_ALTREP_FRONT;IV_ALTREP_BACK;IV_UNCONSUMED_SKETCHES;IV_ROLL_TANGENT;IV_ROLL"
' Create the DXF file.
Call oDataIO.WriteDataToFile(sOut, sFile)
End If
If DwgOrDxf = "DXF" Then
sFile = sPath & sName & " " & strDate & " " & strTime & "_Profile.dxf"
' Get the DataIO object.
Set oDataIO = oDoc.ComponentDefinition.DataIO
' Build the string that defines the format of the DXF file.
sOut = "FLAT PATTERN DXF?" & _
"&AcadVersion=R12" & _
"&InvisibleLayers=IV_TANGENT;IV_ARC_CENTERS;IV_BEND;IV_BEND_DOWN;IV_TOOL_CENTER;IV_TOOL_CENTER_DOWN;IV_FEATURE_PROFILES;" & _
"IV_FEATURE_PROFILES_DOWN;IV_ALTREP_FRONT;IV_ALTREP_BACK;IV_UNCONSUMED_SKETCHES;IV_ROLL_TANGENT;IV_ROLL"
' Create the DXF file.
Call oDataIO.WriteDataToFile(sOut, sFile)
End If
'Set oDoc = Nothing
Set oDataIO = Nothing
End Sub

Kind regards,