I have three fights on my os GGT 15 gas/glow and it has plenty of power for my Twist 60 (only needs half throttle) and I'm at 5,000 ft. Thanks for the input about the needle settings it does want to die on landing roll out. Also noted it needs a fully charged glow igniter to fire up my fuel, but it maybe because I use 32:1 with Coleman fuel. I like it a lot.