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I would cold set the rear to 130mm so I could fit a regular road hub. Probably something like a Shimano RS400 so I could swap out the narrow qr-axle for a wider track axle and use track nuts. Wouldn't want that rear axle to slip because of a quick release.
I'd also braze on a derailleur hanger and some cable guides/stops. Maybe even a tiny piece of steel or brass tube to act as a brake cable guide at the seattube instead of the Kona clamp guide.
How were you thinking of adding the 1x10? With frame mods to the dropouts? I was thinking of adding some gears to mine. Was thinking about maybe squeezing a 126mm 7 speed hub in.