Thanks Treadders; I thought that R-B had a feather system ,but must have got it mixed with the Spitfire one.I really think that the operators of big s/e engined aircraft should really think about prop feathering when re-building,changing engines,etc..Most warbirds have a `pre-oiler`pump system,to pressurise the oil system prior to start,as that is where the greatest wear generally takes place,especially if the aircraft has not been run regularly; however the oil is usually taken from the normal oil tank,so it might need a separate smaller tank....however,an engineer will come along and say `it can`t be done`....!