there are some problems with the reloading procedure, the hinge that holds the gun is way to weak so its going down untill i cant open the breech anymore due its on the ammunition.
so the dyno from the linkage (v 1.5r1) says that your engine is making 3650 hp at 760 rpm and 35840 nm at 760 rpm, i would say that this thing is a monstrosity indeed.
try giving the support wheels a different collision layer than the casters, because the support wheels are colliding with them wich shouldnt happen in best case.
oh the fuel particles should get deleted at the end of the exhaust
because i dont know how to script it so that the fuel particles get deleted after 5 laser hits.