Definitely good to be flexible. I never tried to play pop/rock music quietly - I always had a mouthpiece with a lot of power and I used it. If I was too loud, I would put up a large Acrylic 'reflector' that mounted on my mic stand. This not only reduced my 'air' (on the 'air' in the room) volume, it was a terrific monitor. However, there are different situations for everyone and what you're doing is a good thing. You'll probably find a favorite 'quiet' mouthpiece and stick with that - there's a lot to be said for bonding with a certain mouthpiece. To anyone else trying this I would suggest using two different versions of the same piece where possible. Latenite has a super-duper 8* STM Link, so maybe he should go with a regular STM Link in maybe a 6.