To fix the shell to the floor I cut some right angle aluminium, glued (as no welder) on nuts to inside.
It's still really packed inside. I cut a couple of cables down, but I think I need to do more in tidying the cables.

But it runs!



Still to do:

Wire up the powered on light
Shorten cables
Make a mount and assemble the high speed weapon

But it could happily compete as it stands.