I'm converting my small AD Rafale to P-80 power, and have installed a Tam's Bifurcated SS Jet Pipe. How far inset should the rear end of the SS pipe be inside the scale exhaust nozzles. The way I have mine set now the end of the SS pipe is about 30-40mm in from the rear edge of the glass nozzle. I briefly ran the engine for the first time at idle the other day, and afterwards noticed that the glass nozzles were a little warm. Should I move the pipe rearwards a little to reduce the risk of burning the glass nozzles.

Thanks

Paul