Thanks For the help, I found a better bit for my impact driver, help it straight with some tension, and had my son on the hammer. We got all 3 out, and he only hit my hand twice! When I go to reinstall the plate, should i re-peen the screws, or is red loctite acceptable?
LOL
More training on the hammer. Or revoke his hammer license. Or even better have him holding while you hammer.

Like Jerry said, clean threads and just about any threadlocker.