Hmm, well my hybrid runs the 11-34 shimano 9-speed, so I guess I'm used to it. But a 12-36 sounds much better, bearing in mind that I hardly use the 11. And this bike, by the time I get all the gubbins on it, will be heavier than the hybrid.Something I found when sorting both mine to 9-speed is that the 11-34t and 11-36t cassettes, if Shimano, have some uneven jumps between ratios. But the cassette does come in 12-36t, and this version is pretty smooth right across, and give you two extra teeth to boot!
Edit: if you can do with 8-speed 11-34 and don't mind said gear jumps too much, then I have the cassette and appropriate flat-bar shifters/brakes just sitting here in a box. And the rd, come to that...The levers work fine on mechanical discs.
Appreciate the offer of parts though.
But let me find a donor bike first, and then see where I go. Looking around, most junior frames of that ilk are only 7 speed, so space between the dropouts might be an issue. No point getting bits now, only to find that they don't fit...
And that's assuming I can fit a FD to a frame that comes fitted with a single chainring, as so many of them seem to.