eno hub is great but for a build like this i wonder whether its worth it.
imo (and i’ve done this with no problems):
get a half link chain ($20)
you might get lucky with your gearing combo and the chain tension will be fine with whatever you’re running.
if not, go to a magic gear ratio calculator site measure your seat stays type it in and it will give you a bunch of options for gears that will work for whatever ratio you want.
if necessary, file a bit of the dropout to get slight rear axle movement.
this will solve you chain tension issue (the chain might stretch eventually in which case you either a) buy a new one; or, b) only fit one half link to a regular chain. btw i have never replaced the halflink on my bike and its still fine.
to fix you rear hub spacing issues use axle spacers to get the right chainline. easy.
if none of these worked i would sell the frame and buy one with horizontal dropouts or track ends before getting an eno hub.
How many more parts are you going to colour-coordinate before you realise that getting usable chain tension on that frame will be more hassle that it’s worth?
