A while back my wife found a 1927 King Liberty trumpet at an antique store for about $55 or so. It badly needed a friend, but I sent it off to my trumpet guy and he sent it back in great working condition. Well, I've tinkered around with it, but haven't really played it much until the last week or so, when I decided to start incorporating it as a practice horn every other day, since I alternate between two practice locations every day. The horn plays well - I really like it. I just plugged in the same mouthpiece that I always use on my regular B&S horn, a Stork Vacchiano 2B. That's the only mouthpiece I ever use at all. I keep the horns in two locations, and was about to buy a second Stork 2B, so I have one to leave with each horn. I'm currently carrying it back and forth every day and am very likely to forget my mouthpiece one day. As in, highly likely. I'd also been toying around with trying the Stork in a 2C, (same rim, slightly shallower cup) to see if I like it better, since I don't feel like there's any real reason for me to be playing on the deeper cup, but I like the feel of the mouthpiece - I'm quite used to it and it's comfortable. So my question(s): 1. Is that small difference in cup size going to jack with my embouchure, especially switching back and forth each day? 2. Is a switch going to realize different dynamics in the older horn? 3. If I'm going to try the 2C, should I try it exclusively and drop the 2B all together until I'm used to the smaller cup, then consider which one I want to roll with for both horns? 4. If none of these conditions apply, please proceed to section 2B. (Sorry, it's tax time).