Not sure on the launcher. Looks weedy, not enough worky bits and support bits.
Straighten/level out the main ramp so she's not on there cockeyed, add a couple of supports on the back end (run them to the top of the rear fenders), and maybe add a couple of side/guide ramps to keep the rocket from rolling out of the cradle. Also looks like you may have to reposition the exhaust out of the way abit.
Just my two coppers,
Brian