Ostensibly it worked; however the idea was ultimately canned as (unsurprisingly) there are no tubeless-specific tyres in this size and I had problems with punctures sealing at the tread but not the carcass. This meant that the tread layer would inflate / blister / pull away from the rest of the tyre body; causing both ongoing sealing problems and potentially early tyre death as sealant would accumulate between the two layers causing excessive wear in this area as it stood proud of the tread around it.
In addition the relatively high tyre pressures made sealing difficult / less reliable while the inside of the tyres I tried were textured; making patching / booting difficult to repair larger gashes from glass / flint.
I suspect that tubeless can work very well in the low pressure / high volume environment of MTB tyres where it originated, however I think pushing to higher pressures / lower volumes (the worst obviously being road bike tyres) is going to be of questionable value and more trouble than it's worth.
Oh, and as for the other bits I've tried / not tried - no desire to interact with any of thing things mentioned in my previous post and happy to see some others (CFRP frames, press-fit BBs) relegated to memory; if only on principle rather than any actual negative experiences.
Conversely, I absolutely love hydraulic disc brakes and can accept 1x drivetrains on an MTB; although I believe that's largely where they should remain.