Is it possible and is it likely to work alright if I use a 12-speed front derailleur with 10-speed chain? Difference in chain width is only 0.7mm so I can't see that the tolerance is that tight that it would matter.
Failing that could I use a direct mount FD-M8000 D6 with a braze-on adapter like this: ebay (not AliX as that seems to block my post) braze-on clamp adapter
by RomfordNavy