Big_Stik

Sounds like you are taking the same "stairway" as I did. Both planes are great, both in learning to fly and to build, and both can be "bashed" a little. Two changes I made to the fourstar was sheeting the turtle deck (after the third time the top stringer broke), and using a stronger landing gear. I had a lot of problem with it bouncing on landings. It is also a good idea to screw the servo blocks into the covers for the wing servos. One of mine came loose in flight and my lack of experience caused an ugly crash.

On the P-51, I eventually cut off the nose so I could access the engine better. If I had it to do over again, I would make the elevator more to scale by cutting back the stab, and mounting the elevator more like the real airplane (in front of the rudder). I sheeted the wings so I could paint the whole thing, and used thicker ailerons (totally unnecessary). It still flew great on an OS .46. Follow the recommended control throws also. I didn't and mine will snap at the top of a loop if I pull all the way back. Kinda strange but lots of fun. I also bent my landing gears farther forward cause it kept ending up on its nose if I wasn't careful. I still use up elevator when taxiing, and after it slows down on landing, if I remember. That's about all I can think of that might help.