hey guys, i need a little build help from someone who has put a saito 91 in the showtime 50, did you have to shime some downthrust into the motor?? i maidened mine this weekend, and when i was above half throttle, it flew like it was tail heavy.. i mean like went into a hover... i was pretty high in the air, as soon as i pulled the throttle back plane flew great, landed fine... actually i`ve never landed a better plane, the first time i landed it, it scared me how slow it came in, it was awsome.. but anyway back to the down thrust.... has anyone had to add any???? also i set throws as the book recommended.... anyone changing them, the reason i`m asking is the roll rate was very fast, just ask`n..... thanks ahead of time for your help.