Chevy you could try leaving the group LON up and see if only severing car information doesnt kick it back. My scenario with the TAC 32 is actually better, and worse, in the fact I have dual risers. I know your EPNP stays active, you are just losing HCIE, just like when the car goes into fire service. Makes me wonder if you only tried to sever the car LON, if the group portion would stay working. Another thought as well, with the TAC 20 there are some spare ports. TAC 20's do look for similiar nomenclature, perhaps you could use a back set of contacts, create a new HCIE off the spare port, and bingo, trick that bum into thinking life is good.