I can’t be bothered reading everything above as the last time I posted on one of these I got slammed by the Shimano crowd.
What I will say is what I’ve said before, I sold all of my XTRM988 and XTRM9020 trail brakes due to inconsistent performance, shrieking in all weathers and the need for constant pad and disc maintenance.
I’ve since fitted Tech 3 E4 front and Tech 3 X2 rears to all of my bikes. They’re phenomenally good. Loads of modulation, proper BP adjustment (that screw on XTRs does naff all) and they’re lighter than XTRs too.
The greatest compliment I can give them is that I don’t even think about them when riding the bike or removing it from the garage to use. They just work and each set, on each bike works the same. Flawless.
The Tech 3s are also much easier to bleed than the old Tech 2s and the lever is much neater.