The Twist has a weak spot just behind the canopy. That seems to be where most of them break. I've been flying mine since April with 150+ flights and I've broke it completely in half 3 times in that same spot. I've flattened out the landing gear and broke the gear mount block so many times I quit counting. It's easy to fix and obviously a tough little plane. Most of my "accidents" were from doing rudder touches and harrier. I gave it a hard time, but it is an inexpensive plane to learn those manuevers with. I maxed out all the throws and use 40% expo . The OS .46 AX is a good engine for it. Use a sport prop such as APC. I use an APC 12.25x3.75 for 3D. On low rates it's a babe and on high with maxed out throws it's a cut-up.