im after a way to build myself a tail pipe like the ones you use on the larger turbines on a lambert kolibri the priobelm i have is where is comes out the plane its close to composite and i thought if the tailpipe was like the self cooling ones that they use that might help to cool it down does anyone have a sugestion on how to build one and obveiously it would have to be reasonably light the one that lambert selld is a basic round tailpipe no cooling