RE: Sig 4 star 40
That looks real nice Andrew.
FWIW, I built mine stock and it has survived many violent snaps and hard landings. I have put the wheels into the wings a few times. I had my youngest on the buddy box and was showing him how to do snap rolls. I do them on an upline and he forgot this part and did it from full throttle at level flight, no problem.
I would ca the wing mounting dowel and hole to beef that up a bit. After MANY flights, mine got a little loose. I do this to all my planes now.
Mine has flown with Magnum 52 4st, ST51, TT46, Saito 82, OS55AX, Saito 45. Flies better lighter, still flies good with the heavier engines. The Saito 45 is off to make room for a Saito 65. The battery will need to be moved back to keep a good balance point.
Mine flew a few years at the suggested cg just fine. I started moving things around to get the cg back further. Much better!
This is a fun one!