As far as checking the sprag on rebuild, if the pins are straight, move on. Not believing failure could occur on a new sprag when a driveline part brakes, when it free-wheels and slams back under load, no way is it strong enough to not damage or brake it.
Totally disagree; rollers with flat spots can co-exist with straight pins. Sudden shocks occur with Clutchflites/Neutral and failures aren't epidemic with such abuse.
Clutchflites- neutral starts? I can take a big hammer and beat the crap out of anything too.
Must have taken 100s apart in the last 50 years and never saw flat spots on rollers, unless sprag was broken, thoreticaly impossible to slide under load (they break first or the springs have lost tension from heat) seen plenty of broken, chewed up ones. Of course I should add, inspect ever part of the sprag unit to be safe before putting back in service. To each his own.
