[caffel]

Bravo.
Anyone who thinks this is too complicated or is planning to build their deploment at the contest hasn't gotten the point yet, and sadly there are several threads on this same topic now.
I like the back plane to act as a pusher and the posts.
We've been dwelling on the posts a while. (Estes rockets are a topic)
I'd suggest that the posts must extend above the center of gravity of the MB in order to keep the MB from falling off in the inevitable high speed collisions.
Please continue and suggest some standards for the placement (or optional locations for the 'launch posts')
At 423 and 1712 we are planning to use the Tetrix tubes for the posts, but still looking for the ideal way to attach them to our shelf.