You learn something new evey day, but how does being 20mm short in the pipe help the cooling when the pipe end is inside the fus? Surely 10mm sticking out the back end will have more effect towards cooling. If you do have a wet start any unburnt fuel inside the pipe as you tip it out the Turbine might run through the pipe and make its way back into the rear end of the fus if it not completely sealed. Just asking as most of my turbines are outside in the air or the turbine is at the rear end of the fus.

Paul