Unfortunately, the "oversize" re-coil kits aren't available in a 12-24 thread size and the special 1-piece inserts use the same size taps as the helicoils which pulled out the threads.

I'm wondering if I can re-install new 12-24 helicoils w/ red loctite into the very bottom of the holes and run longer bolts that reach into where there are still threads to hold the inserts...