Jimmy, I'm a seven decade old fart with creaky joints so leaning over a fender with my head and back twisted to see the ball bearing was a real trial, especially when you toss in poor eyesight. While I had the cover off to adjust the valves I rolled the engine until the intake valve on #1 opened and closed and the ball was under the pointer. Then I attatched a pointer to the timing cover and painted a white line under it on the front pulley. Unless I twist the crankshaft it's just as accurate as the one on the flywheel and a bunch easier to see.
