I bought a used BMB F tuba a couple of weekends ago, but the seller only had the gig bag available. I'd like to get a hard case for it (probably an MTS,) but I'm not 100% sure which one would fit it best. I have thus far been unable to find exact interior dimensions on the cases, but my best guess would be that either the 1204v or 1207v would be the best fit. The horn is about 35" long, about 18" across the widest point of the body, and has an 18" bell.
Can any of you give me some help on the internal dimensions of either of those two cases, or perhaps recommend another brand/model of hard case? It doesn't need to be anything fancy, just something more rugged than a gig bag.