[Royce P]

I deal only with Langs and Chaffins. Both of them sell the original #14-24 bolts and the 1/4"-24 bolts. The new flywheel ring gears use 1/4"-24 bolts. Old original ring gears use #14-24 bolts. You need to know which to order. I would be suspicious of any vendor that didn't offer both, because the hobby uses both.