Last time I talked to Rob, his designs don't really work well with a low B shorter than 34" scale. His designs utilize a very resonant instrument. In short, it's hard to serve the purpose of a resonant semi-acoustic and a structure rigid enough to have a low B in that scale.
If you want a shorty with a killer low B, I've heard nothing but the best about Cliff Bordwell. I was so impressed with the high opinion of TBers that I have one on order that is nearing completion, although it's a 35" scale 4 string...because I'm crazy like that.
If you're willing to ditch the low B, Rob can build ya a 32" scale MB2 with a high C. I will eventually order one of these. No bull.