I bought the EXI 250 from Xheli.com. The kits are built with torx screws. Very small, very dumb idea. I did get the new Align tail boom holder and it does fit directly in the frame. As of now those were the only screws that were giving me a problem. I would like to find some screws for the horizontal fin and tail assembly but that'll be later on down the road. I'm so upset about this buy that I dont even wanna think about what it needs. Because it was a cheap build and the tail didn't hold at all, even with the screws as tight as I could get them, I broke the boom, bent the main shaft, feathering shaft and it could use a new belt. The stock EXI belt is right crappy and is already fraying. Looking at $20 in parts if I go EXI and xheli.com. Or $35-40 with Align stuff from HeliDirect.com. We'll see what the future holds.