RF01 - Oil Tank Filler/Cover thread repair

On my RF01 I've had a constant leak from where the oil filler/cover meets the tank.
Turns out one of the 6 threaded blind holes is stripped out.

There is a lug of material on the tank that should allow for an insert.

The other option would be to go a size up. Current screws are M5-0.80 which seems small and too fine for the material.

Thinking of using something like this:
https://www.mcmaster.com/93715A605/
or like this without stakes:
https://www.mcmaster.com/90259A218/

Any suggestions? Anyone done this before?

On mine years ago, I drilled them out for a 10-32 helicoil. Save the keenserts for a hole that is completely blown out and can’t be helicoiled.