I came across a plugin that I happened to like but ran into some problems. It’s the free Roland MKS20 emulation from giulioz. The plugin did just not understand the note messages from my Kawai VPC1 so good - at all. Retriggered Note On messages kept ringing forever. I came up with this script to use in a scriplet. Quite simple but as a newbie to scripting it took me some hours. 
var
tracker1 : NoteTracker
On NoteEvent(m : NoteMessage)
If IsNoteOff(m) then // If note message is a Note Off
if NoteTracker_IsNoteOffPending(tracker1,GetNoteNumber(m)) == True Then // If note has been pressed earlier - send note Off.
SendNow(m) // Send the Note Off message one time
NoteTracker_GotNoteOff(tracker1, GetNoteNumber(m)) // Register the note as Off in NoteTracker
end
else // If note message is Note On
if NoteTracker_IsNoteOffPending(tracker1,GetNoteNumber(m)) == False Then // If note is Off when key is pressed
SendNow(m)
NoteTracker_GotNoteOn(tracker1, GetNoteNumber(m)) // Register the note as On in NoteTracker and send note On
else // If note is on and retriggering
SendNow(MakeNoteOffMessage(GetNoteNumber(m), 25)) // Send Note Off followed by a Note On
SendNow(m)
end
end
end