I actually had a hell of a time with petg with a 0.6mm cht on a dragon hf, ended up going back to a nozzle x because of it. I also found the bimetal cht nozzles really fragile, like 1.5 Nm torque from one of those slice preset wrenches and I’d still manage to have them shear off in the block after a few nozzle changes.

What did help was lowering the temps and being aggressive with the retraction speed (went up to 50mm/s if I recall), but even then the cht nozzles oozed a lot with petg, could have tuned a bit more but as I said I ended up going back to my other nozzles.

Kept the dragon though and actually swapped my mk3s over because I like that the block is fixed for nozzle changes and actually changed my voron to a dragon UHF that seems to be working well so far.