[mickmate]

Genuine Helicoil are used as original equipment part by industry such as Aerospace, Aeronautics, Avionics, Defense, Automotive, Heavy Engineering, Power Generation, Electronics & Telecommunication, Electrical & Light Engineering.
Hmmmm sounds like they'll work! If you can use needle nose to break the tang off you'll be able to hang onto it and pull it out. Greasing the tap will stick the chips to it instead of dropping them in which may help also.