Re: Another mighty initial thrust idea
There doesn't have to be, a rocket provides it's own reaction force and doesn't need anything to push against. Only if you start adding other contraptions to the design do you "need" the inertia of the lifting rig.
I'm very much against the idea about strapping more boosters to either LOHAN or the launch rig (Or complicating the launch rod any further than a simple rod and runner). Every bit of complexity you add means another possible point of failure. And every possible point of failure means a bigger chance of something going wrong. Better adhere to KISS. Possibly get a bigger rocket with a special design combustion chamber (yes a solid fuel rocket has one too) to provide high initial thrust and then drop to sustained boost. Adding drop away boosters just gives Murphy's Law too much chance to come into effect.