No need to apologise, all feedback is good! The reason I wanted a spinner is to have an effective weapon and not just an armoured RC Car basically. Done RC Cars to death. The spinner location was to avoid having a horizontal spinner hitting my spinner without being slowed by a wedge first. Just worried that that much KE would be too much for most drivetrains to take reliably. So heavy armour at the front of the wedge, and a speedy bot to make sure I can get underneath a good way to hit them.