I think if the weapons were on axles it would be much more effective, like this:https://gametechmods.com/forums/index.php?topic=693.msg62374#msg62374 (2nd bot on page)Also, Welcome!
Seems like you have really too much extenders, minimize your extender work.Also add another pair of HP Z-teks and wheels, so it spins faster.
here's a video: what are some of the records for fastest kills? (other than HW vs LW)
Also the reason you're not able to get shinies on it is because of inefficient chassis management.
Looks to me that it's more of an issue of Z-tek rotation. You have the pointed end of the Z-teks facing down, which doesn't allow shiny hubs to touch the floor. If you put the flat side down, it should work.