I also have the Creek Staudacher ( I have the Extra in the box that is why I'm following this thread) with a Moki 1.8,Bisson Pitts muffler,TruTurn 3.5 spinner, 18X10 wood prop, 6 volt 1650 ma NiMH pack mounted at the firewall, a 24 oz Dubro tank at CG and it balances at 4.850" from the leading edge with no added weight. Haven't flown it yet but I'm hoping it will be ok (my first large scale).
Hal