Hello there mighty good one! I hope you have a splended time launching. Also, check out www.kerbal.net and find some good mods! I recomend the protractor mod to get to other planets! Also, boosters run on their own fuel, and non stop, Of course you have figured that out already though Also, Sal, its CTRL Z on windows, not alt and dont forget shift+ qweasd to fine tune! And caps lock for precison controls in flight (useful for planes) Anyhow, you are doing good, and i wish you well. Happy exploding! -TD.