I've got a meg15 and tiburon, run them pretty much stock, and have no complaints. I like the minnow counterlungs. The only real "modification" I have is a QC6 port for plumbing in DIL, useful for cave diving where you're potentially encountering a lot of sawtooth profiles.
FWIW, you probably won't be able to be trained with it configured with backmount counterlungs, you'd need to do that after the fact.
FWIW, you probably won't be able to be trained with it configured with backmount counterlungs, you'd need to do that after the fact.