Well My buddy and I have figured it out we think. I tried the about the same setup on his G2 simulator and we got the same results as what had happened to me. The climb out was not fast enough or hard enough on the throttle and was climbing at a resonable angle but not fast enough. I think I should have applied full throttle as soon as i left the ground and started to climb. The tip stall was the same as on simulator as what really happened. I have never experienced this before but then again this is the first 4 stroke I have ever flown. i always have my 2 strokers humming pretty good as i get off the ground but i just am not familiar witht the 4 stroke sound and its hard for me to actually tell what rpm i am going. So I will chalk this one up to pilot error and hopefully this weekend be back in the sky with the new spacewalker. I am going to actually put the saito 72 back on it and let friend from a club try it out just to see if its me or not. Well thanks for all the input and advice and I will let you know how the new one flies.