Kalibrgun Trouble with a Kalibrgun Cricket Spring Tensioner

I couldn't find a maintenance section on AGN so am throwing it out to the PCP guys.
I have a Gen 1. Kalibrgun Cricket. The HST is stuck in it's channel and, it being made of plastic, is now stripping when trying to remove.
I've tried adding a little penetrating Kroil to soak into the threads but no dice.

Drill it out?
Use Weldwood epoxy and "glue" in an Allen key?

Any recourse anyone can think of?

Thanks