It’s nice to see these getting some attention. I have had three Unicorn basses, a five string Artist, the sister bass of the Mark King bass and an Ozellman four string passive (which I still have and play). The necks have purpleheart wood in them, which makes them incredibly stable, without carbon fibre reinforcement. The attention to detail in the builds is staggering. I think they look the best with two humbuckers.
The Artist five string was a 32 inch scale, but the B-string was stable and defined, probably better than other 5s I’ve tried. The scale/tension relationship you expect, doesn’t apply here. Also, the action can get ridiculously low on these, which makes them feel responsive and have a fast attack.
I’m keeping my Ozellman. For some reason it plays and sounds exactly right on recordings. I would encorage anyone to check them out.