RD
Any chance that your local flying school flies Pipers like the early PA28s and PA30s? It's rumoured that Piper wanted to put the trim wheel in the baggage compartment to get it out of the pilot's way but there wasn't room so they put it on the roof instead.
I can see an argument for not moving from throttle quadrant to roof mounted trim at critical moments, though I don't think it's necessarily correct.