It will be massive beneath the bridge, and, like my very first successful guitar have two parallel braces on the bottom plate which also define the stability of the construction while the top between bridge and neck will be able to move freely.
A Bass VI is a Baritone guitar tuned as deep as a bass with two additional strings, EADGBE, one octave below a guitar. It needs strings with small ballends ans of course appropiate strings (Low E 0.095"). It also has a narrow guitar like string spacing. In this example i would probably have to look for strings for a Schecter Hellcat VI. Alternatively for a Bass VI or a Beatles bass with two additional strings for an archtop guitar. The string height is guitar like on the treble side, but of course bass like on the bass side. Shortscale bass like, i.e. with slightly larger string height than usual. And that makes the matter difficult.
Now i am in search of suitable (and affordable) single bridges. For guitar.
What i know:
Hipshot: that's a traditional Strat bridge as a set of singles. Hard to buy from Germany. Moreover: strat bridges are a nightmare in connection with bass strings. The thick E-string must be heavily bent.
ABM-Müller: easy to buy, pretty. It is unclear wether the adjustability is sufficient, especially in string height - which is critical for bass strings in a guitar bridge. And i doubt there will be enough space between saddle and string holder. Too narrow for the low E.
Kahler: Similar to ABM, and harder to come by.
All of those would have to be modified at least to mount the low E string.
Is anyone aware of other possibilities? I would actually prefer single bridges over the usual integration of bridge and tailpiece. That would allow me to make an arched top.