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Next pass I put a 3K chip in it to calm her down a bit, let go of the button and it launched about 2 feet and ZINNNGG !! up on the 7K chip.

Sounds like the rev limiter saved the stock front drum from coming apart.

A low band apply valve body and a 16-roller sprag (Coan Super Sprag or A&A Ultimate Sprag) will help a lot. An aluminum or steel (not stock cast) drum is a good safety device.

I like the stepped bolts of the Coan better than the A&A plain bolts with compression ferrules.