I'm another one that went from flying parkflyers to glow planes. I made a huge jump going straight into a 4*60 with a TT91FS. My first flight was awesome. The plane took off after rolling about 10 feet and climbs completely vertical at 3/4 throttle. I think you'll be fine. The difference in power, size and weight are quite a jump, but just back down the throttle if things get a little hairy. I'm sure your glow plane will fly slower than you think. Good luck.