To give you an avenue, your season is done until this thing comes out and is repaired with major surgery. The pistons don't have enough depth on the ring lands to survive blower pressure and decceleration reversion extremes. This will happen again with your current setup. I recommend a blower piston with deeper lands to prevent this from happening again on the repaired motor. I also noticed a tell-tale sign on top of the piston of a heli-coil. Is there a repaired thread up on the intake area or elsewhere a heli-coil can let go and enter the cylinder?