Your BF cab is pretty much FRFR ( full range flat response ) so you're halfway there. You could use it in the PA and go IEM with a pretty good idea of what will come out the front already.
There's a bit more to it than changing bulbs as the LED are itty bitty things surface mounted to fancy circuit board which most home hacks will turn into a pile of scrap. Find the UK service agent.
Traditionally 'backline' is the monitoring when you have FOH.
A lot of backline in use is more suited to festival stages outdoors, being fully loud enough to be way too loud, and directional indoors. Trying to mic it up for FOH winds up a fool's errand.
Talkbass basses for sale has filters for 4 and 5+ strings as well as lefty.
I think the search will find all semi-acoustic electro-acoustic just with searching on acoustic.
There's always the Wanted section but afaik it's still unbumpable, except for moderators.
That's some pretty exotic tapping. I now have precisely no idea what's problematic.
Do over time.
If you play it and report which notes have buzz maybe all will become clear.
Post here used to chuck your stuff on a shelf and send you a letter of demand on behalf of Customs, all for free. Then the volumes got out of control and they realised what a racket they had been missing out on. Booh.
I received a custom bass from the luthier in its case, secured with liberal duct tape. He was adamant it was the best way, as to encourage couriers to take care.
I used to run a big board. To get around the low end loss I split the signal after the octave, high and low and put the highs through the other fx before blending back.
Prunes and Custard figured highly in faux synth stuff. Also octave fuzz envelope combinations.