RE: Timing a RCexl without degree wheel
Piston stop = cheap LONG reach 14mm plug or long reach 10mm plug. Paper degree wheel on a piece of scrap wood. Paper clip. Total cost $2. It times as accurate as $50 worth of dial indicators and dial calipers.
Ya pays yer $$ and makes yer choice, any method will work. BUT the more accurate your TDC is the more accurate your timing is.