How to chase helicoiled threads?

Thanks All -
I think I'll just pull the helicoil out and put another one in as I have 5/16 on hand (after chasing the hole with the correct tap). Definitely going to need some sealant in there, but that's always the case for those holes. The threaded inserts look pretty cool and I'll have to try some in the future. Pricey though.