Slight correction of inignificant detail (this is the rivet counter board, right?) The P1 triple on the car was missing it's slide valve and piston. SVRR purchased another partial P1 from Midwest Locomotive Works (Stephen Butler) which had it's slide valve and piston but was missing the parts out of the emergency section. SVRR had brand new parts to replace these as they are the same as the ones in an H1 or K1. If anyone out there has a spare triple piston and slide valve for a P1, I'd love to have it to build up a complete spare.