If you use the search button you'll be able to find some scattered info on these pieces, although they don't seem to be super well-known. There used to be a great old brochure on Theo Wanne's website but it seems to have been removed.
The two I've had have both had really large scooped out chambers. These were both B5s though. One problem with them seems to be, like some other more famous vintage pieces, they're very tight on the neck cork. I can squeeze mine on okay, but if I use my STM right away the cork is too compressed. I guess if you're not careful the shank can crack.
Get that Conn straightened out and you'll have a great old piece for it either way (just stop dropping it

).
Grumps said:
Once modified, you almost can't call it a vintage mouthpiece anymore. It's an altered vintage mouthpiece. A K6 isn't a very common facing, and as long as the tips and rails aren't damaged, there's no need to reface it. If it works for you as is, and it just might, consider yourself lucky. If not, why take the chance sinking money into altering it for only the possibility that you'll like the altered version; knowing you could never resell it for what you've put into it? No, if it's not your cup of tea, sell it as is to someone who will appreciate it unmodified, and find another piece that works right for you off the bat.
Hey Grumps,
You're awesome and so no offence please, but to my ears you're sounding a little more like the crank than the logician here

. As far as I can tell, these pieces have very little resale value anyway (both of mine were purchased for under $30) . In any case, while I get your point about modification in a semantically precise sort of way

, my reason for "taking the chance," as I explained in my post about my absolutelykillerawesomeloveofmylife NYWWco tenor piece, was the possibility of ending up with a "modified vintage" piece that will, I think, compete with any number of similarly modified vintage pieces that are presently going for HUGE dollars. I actually did play an unmodified B5 for several months before my "adventure with Ed," and, while I liked it a lot and could see its real potential, it was also clear that it needed to be modified to be viable for my purposes. Specifically: the tip wasn't responsive enough and the sound was too spread/quiet for the bandstand. FWIW: last night the NY got the call and the Morgan 8L stayed in the case

.
Q: supposing the modifications Ed did had been done in 1941. Would that disqualify it as a vintage mouthpiece?
Q2: you're not trying to trick this guy into selling his find so you can send it to Ed are you? :twisted: