Glad I held off on the Thermocore just for a bit, now I have no excuses
Time to Forge ahead !
Does the mouthpiece get warm at all during use with the Anvil?
Still getting bizarre spontaneous combustion events on my Anvil but I talked to the guy that sold it (a aussie reseller) and he mentioned there was some problems with some bowls about the time I bought the Anvil... I'm guessing I have a dud and it didn't really matter until I used the ThermoCore oven.
I can go back to back without it getting uncomfortable to touch, the mouthpiece never really gets hot, thanks to the thermal break provided on the USA. It also fits the stem flat and perfectly with no orings being shoved out of the interface, you really don't want that on an Anvil.
I have never combusted using my Ronxs torch with the Anvil unless one of two things occurred.
1) I went past the second click
2) The flame size was longer than the oven itself.
So it is likely if you were getting combustion outside of these two things, there was probably something off with the bowl. Both my XL and my Regular bowls click at the same time, I know this because my partner and I usually hit our Anvils together and the clicks are incredibly in sync most of the time using the same torch.