No, NEVER get rid of the oem stuff. I wish I still had my old oem flexplate, I would've had the ring gear repaired had I known back then. I got rid of the original starter too. uuuugh. I really want to measure a stock flexplate and compare the results with the aftermarket pieces.So what I'm hearing is, if we have an issue with the starter, have it rebuilt or do whatever it takes to keep the same one.
Thanks for the info, it may help others down the road.