120 dropout 35/37 with guards tyre clearance frame suggestions please

Late night 'fuzzy brain' in action. The morning reminds me the difficulty I had with the CC was not being able to tighten the rear wheel sufficiently with a q/r. Could have been easily solved with a bolt on hub. The chainring / chainline limitation came up with a 1x1 which was designed for 135 hubs and middle ring chainline.

I'm being a cheapskate and don't want to change wheels which are 120 hub spaced for 126mm.

I'll check with On-one it's likely that by loosing a bit of chain adjustment capacity the wheel can be set back further in track end to give a bit more tyre clearance.

That makes sense, the other opton with the Crosschesk would be to run chain tugs if you really want QR hubs. I've never tried it myself but I'm sure that it works ok, but I I'm not really a fan of the fixed gear with a QR hub. The forward facing drop-outs on the Crosscheck make removing the rear wheel far easier if you have full length mud guards on too.