A rather fast plane, im sure its top is in the 5 didgets but i got it to over 8000 before going in the water. It starts to shake around 2k but it's barely noticable but around 3500 it starts having a seizure. when it shakes it controls as if it's not except it loses some acceleration, but otherwise fine as long as you dont use first person. it's stable till it gets over 2500, put the trim slightly over half way to the first bar up to fly sorta smoothly. made for speeds of around 2k but it's your choice wether you go over that or not. feel free to improve and post as long as you give me credit for the prototype. have fun! (I'm suprised you read this far)