You should have some movement with the engine directly bolted, the mount holes on the chassis provide that. I havn't run mine yet and just assume I have a bad spur gear because it clicks regardless of how the truck is meshed and there is no friction. I assume your truck won't run long with how its being described. The 15T bell was not the standard gearing for the .15, it was a 13, the .18ss and the new G3 have standard 15T bells.

I have pics of my newest acquisition. It comes with eight extra rims and a full set of geolander tires that aren't shown. Does anybody have experience or knowledge of the OS .15? The RCU reviews are decent. The OS website says it has .68 bhp compared to the CVRs 1.35 yet it claims the .18 has 10% more power than the .15 which doesn't make sense. That rating seems low.