Argh this is all really vexing. Road triple mech doesn’t have the ‘range’ to shift to the big ring on an MTB; due to spacing of MTB chainsets; I know this and the pulley adapter hasn’t even arrived yet. I think I need to stop rushing to finish this and take a breath, so I don’t end-up spending (wasting) money on components that simply won’t work together.
One option is to go back to the XT front mech and either make do with one redundant chainring for a while, or use an old Dura Ace friction bar-end shifter with it, and see if that works (probably won’t have the cable pull ‘range’).
Obviously there are frame clearance issues when using road chainsets on MTB frames (my frame has a 63mm BB shell). I might be able to use a compact/CX double up front. Or maybe even (shudder) go 1x10; which would eliminate the FD issues!
The other issue is that indexing is a bit sketchy between 10 speed levers & 11 speed mech (pull ratios again!); so I probably need to get a 10 speed long cage mech, or try a dropout extender link with an old 10 speed short cage mech (anyone tried a Road Link?)