Okay folks, a question here, I have 3 Kato built steam engines and 2 Model Power Steam engines. All feature good running, but have truck mounted rear Rapido couplers right now. I know part of their good running qualities come from having the rear truck picking up track power. Has anybody just used the simple expedient of swapping the entire rear truck for a MTL truck with their coupler? And if so, has it degraded performance? Thanks folks.