Yeah, that is one Hell of a good looking bass. And, being the happy owner of a lefty '20 4HH Special, I know it's a very good sounding one, too. I sort of agree with MIJ Fender Guy, though; it would look nicer with a different pickguard. My choice would be a Cream/Black/Cream one; like I have on... several... of my basses. My 4HH is finished in Burnt Umber with a Rosewood fretboard, so the Black Pickguard looks good on it.
A question; the fingerboard looks really nice, but... what is it? "Normal looking", streaky Ebony? I have a lined fretless Birdsong Fusion with a fingerboard like that; I'm very happy with it. I also have a Canadian '93 Fury Anthem lined fretless with a fingerboard that looks a lot like yours; but... it's Pau Ferro. Which, IMO is a great wood for fretboards (my fretted Birdsong Fusion II has one), but from the wear on the Fury Anthem - which has never worn anything but tape wounds - it seems to be just a little soft... Doesn't need re-leveling yet, but it's... close. However, I have no idea how much - or how hard - it was played before I got it...
If I wanted to have one made, it would have to be lined. My 7th grade music teacher declared me tone deaf - and banished me to study hall. It wasn't until a couple of years ago, that I decided to see if there were any left-handed lined fretless basses. Turns out - yes, there are. And when I looked, the first one that popped up was the Fury Anthem on Reverb. Since I started playing bass in 1968, I lost a lot of good playing years...
I am planning on having another lined fretless built. A Musicman 4HH would certainly be nice, but... I'm leaning towards a 32" scale one. I already have two 34" scale fretless bases, and a medium scale one would be nice. I'm thinking maybe a 32" Serek Sacramento - to go with the fretted 30" one I already have... Anyway;
Congrats on a really, really nice bass. And, don't worry about using it on stage. If you really do sound good at home? Then you're good to go...