size? ok, so ive been playing trombone for about 6 or 7 years now and ive been playing bass trombone for about a year and a 1/2 and i use a schilke 60 for my bass trombone. i just started using a bundy trumpet with a new bach 3c mouthpiece my dad got me for christmas which is a nice mouthpiece but i believe it is 2 small 2 be switching between a bass trombone mouthpiece with 2 make a constant full,centered sound. I was thinking about buying an custom made trumpet moutpiece from mouthpiece express with a +++ cup diameter 24, plating satin silver, GP irm/cup rim contour 1 rounded, cup volume E, large and the backbone d medium large, slightly curved out, any advice to help me???