Fodera, Sire, Warwick, MTD, Ibanez, Ken Smith, Status (the Hellborg model was even running on 4 batteries, so 36 Volts...), loads of luthiers basses, ... have an 18 Volts preamp installed.
I bought a sixer headless bridge system from André and the quality is really top notch.
Beware that there are bad imitations available on the internet.
You can watch them on his Reverb store: https://reverb.com/shop/andres-gear-outlet-227
Or on his eBay store: https://www.ebay.com/usr/apassini98
Or check his website: https://novaguitarparts.com.br/portfolios/ponte-headless-para-baixo-4-5-e-6-cordas/
If you want to be a bit reassured about delays, I waited my Leduc U-Contrebasse 6 EUB (called Moaï ) for 7 years and my Leduc U-Basse 6 fretless is going to delivered in a few weeks after more than 5 years of waiting.
But Christophe is a friend and you know how it works with delays and friends...
That said I always had news about the building progress ... when there was some.
These are excellent lightweight replacement bridges, not sure they will fit a Bongo... Just ask them.
https://www.ampshopbassexchange.com/product/albridge-parts-mq5-sterling-music-man-replacement-5-string-bass-bridge-black-18mm-string-space/
https://en.m.wikipedia.org/wiki/Left-_and_right-hand_traffic
If you read it, you'll notice that right hand traffic is the most common worldwide by a huge margin.
You'll also notice that in ancient times people were driving in the middle of the road and when crossing, they kept the ... right side of the road, so please stop with this absurd assertions.
And once again U.K. was, is and will always be in Europe, but decided to get out of the EEC, which is something different.
Just for the record @Chienmortbb:
https://mossmotors.com/how-to-positive-or-negative-ground
And what I wrote were just facts as I don't care what you use as long as you don't pretend they are the only correct options.
These were just to demonstrate that there's no right option, so a truss rod is not working in reverse, but is a left or right thread working system and both are totally correct.
Got it?
Don't you drive on the left side of the road?
Don't you use left thread?
Don't you use imperial system?
Didn't you put the positive of batteries to the ground?
Strange to ask such a question, no?