Ed, thanks for taking the time to post those links, i myself pretty much learned on my own and what a learning curve it was. Thankfully theres these forums full of usefull info. I started with a Dynaflite heavy duty high start which seemed to be okay, i launched my BOT many times and then i bought a used 3M Esteem, the launches always seemed very slow and the plane wanted to wander on the way up, i always thought it was my lack of piloting skills and some was but when i bought a Hosemonster catapult what a difference that made. the Hosemonster is 50' of 3/8 rubber a 50' of line then a 125' clipped to that. Ive since graduated to a Experience pro that i bought used and still fly the Esteem no more drifting one way or another most launches are straight up the line, now all i need is some more practice on my zooms just cant seem to get my timing right but im sure someday that will come.

Steve