The lateral brake should be Q.
Also: I discovered the other day that you can take off straight up and down, and strafe, using the arrow keys. This is a life-changer. Until now, I hated piloting manually because I would always have to gun the engines and slide along the ground until I went over some sort of inline or ledge. Now I can do what the AI does

@ Neonivek: I usually do, or build a rocket only because it's a rite of passage. A tiny, 3x4 spaceship using rocket engines is faster, more fuel efficient, and can hold a lot more cargo than a rocket. Easier to fly as well.