Hi Tiger, these motors should have a spacer ring under the motor because they are on Victa frames so they can go on any pretty much any other base other than Victas of which there is floating around, Rovers or anything else of which I have dozens of here if that helps. Rover catchers is something I am a bit short on though. Powertorque frames I am always short of because of the rust problem.
Cheers Norm
