Thanks for the input guys, that actually makes a lot of sense. Further digging on TankArmy actually lists the new Pershing & Bulldog wheels and spells out the removable hubs. I remember talking about the pain in the butt Pershing wheels were to remove with club members, it's nice that they work on things like that.

I'm in the process of putting one together so I'll make an effort to check out the internals when / if I get one and try to get that on here. It's a cool tank that seems to not get it's share