Mrs Zero and Mrs Drummer are glad to provide that service. Sadly, it mainly consists of saying that the bass is too loud. Still not sure if that comes under the definition of "unreasonable behaviour".
I built one with an ESP32 and a couple of footswitches - made it 9V powered as it was intended for use with effects as well. The Lekato looks an excellent buy, costs about the same as the overall cost of components and die-cast box for my DIY job - although mine will do line up and down, page up and down, and switch between apps.
I use 40-60-80-100-125 or -130. I don't have any issues with them feeling wimpy and sounding soft. Still, if you want 45-65-85-105-130, buy some Elites.
I use wireless for everything - rehearsals, open mics, gigs. On Tuesday I forgot to take a decent length jack-jack cable to run between effects and amp to rehearsal, but I always carry both the WS-50 and WS-90 so I used one for bass to effects and the other for effects to amp.
For us, playing pubs with a vocal-only PA, soundcheck - two verses and choruses of a song using BVs. Checks that the vocals are balanced and the instruments are balanced with each other and the drums. Seeing as most of the time we have to eject people from their seats in order to set up, we're never going to get to soundcheck in an empty room. And we do a song that everyone will know and we do well, so those already there may have their interest piqued enough to remain (unless they're sulking at being ejected from their seats).
Once it disappears into Evri's maw, it can be over a week before it re-emerges. The mills of Evri grind small, but they grind exceeding slow.
I'm not sure whether it's a universal AliExpress thing, but I think all the things I've bought from there have gone to Evri as the local delivery company - so far without problems.
None of the wooden shims above.
I've used these https://www.ebay.co.uk/itm/197187183253 - you can calculate the necessary shim thickness, which is handy.
TGI Extreme (guitar version, used for headless basses) has been doing a good job.
I've also got a Thomann E-Bass Gigbag Premium which has more pocketry. The straps are better (easier to put on) on the TGI but the Thomann one is fine. I used to have the guitar version for headlesses, the only drawback being that the reinforcement for the strap peg position catered for the single fairly central strap peg of most guitars, not the widely spaced double strap pegs of headlesses, and eventually (after several years) the main zip started to go.
https://www.ebay.co.uk/itm/405326641329
Currently carrying assorted leads, a TC BAM200, a tablet or two, a tablet holder, a spare T-shirt, and my other smaller bag with wirelesses, batteries, tools etc which I use for open mics as well as gigs.
I started on classical guitar (my brother's, as it happens). Very difficult to play barre chords (I have a classical guitar now, and still find it difficult to play barre chords on, 55 years later). A steel-strung acoustic proved much easier to play.