Tim, there are a couple of problems with your vapour:

1) Only you have any idea what its supposed to do or look like. Just describing a fairground ride and hoping the writers have seen it doesnt help.

2) Most. Overweight. Vapour. Ever. An inch of Ti you might be able to get away with, on a really small robot. Closer to two inches? Never. Over an inch of hardox would make it overweight even if it was a superheavyweight. Eteks weigh something like 11 KGs each and while magmotors are generally fairly lightweight, 8 of them is still too heavy. This isnt even taking into account the actuators/hydraulics needed to move the weapon from horizontal to vertical...

3) What magmoters are you even using? I dont think most of them can be run at 48v without blowing. Heck, most of them are over-volted at 36v.

Apart from that its OK