Mine is the lastest version with modes done to firewall, l.g. block and hollowed out turtle deck. I strengthened the area around the wing block holddowns and that was about it.

S.T.2300 w/Perry pump and carb 20% Ritches brew, Bisson muffler(sounds nice) 18X8 Simitar prop. 8300rpm
Fuel tank on C.G. 1100 milBattery behind firewall and throttle servo also. Balanced right on rec. C.G.

I will be relplacing stock L.G. with C.F. gear, will lighten about 3-4 oz and also move C.G. which it needs to be a little more aerobatic. With C.G. @recommended 5 5/8 is stable and predictable.

C.F.elevator rod supported by a bearing at back and forward formers.

FMA coreless servo's on 6volts 110 in oz.

I had the stock solder link come out of my ball clevis at the rudder servo wheel, happened on the ground when servo drove over hard with accidental receiver on trans on wrong airplane. So I went to 4-40 hookups. If it happened on the ground it could happen during a knife edge loop. And this plane is capable of it.

Mine however wants to fall off to the right when it does stall. perhaps at tad heavy on that wing or elevators out of sinc.

S.T. has enough power to do all the adavanced manuvers and will hover on about 1/2 throttle. Could use a t touch more power like a O.S. 1.6 or the larger 4-stroke. But I had the engine and the plane was cheap enough.