Jeff, what material are you using to hide the gap between the cowl and the removable hatch? I'm wondering why you had to use so much dead weight to meet your CG when you have the FG40 installed using the stock Saito engine mount? I have the FG36 installed in my H9 Spitfire which is basically the same as the FG40 and I only required 382.7 grams (13.5oz) to meet a CG of 130mm?