I just moved my rear fixed wheel from 126 spacing to 122 as well as changing the chainline. I consequently cut off a portion of the hollow axle that I was using on the wheel with a QR skewer.
I know some object to using QR fixed whatsoever but that aside:
I would've thought it was possible that instead of cutting it down to just thread a bolt on either side and secure it that way?
In this case there was not enough thread protruding past the dropouts for the bolts to get enough purchase on, but if there were more would it have been possible?
Thanks for any replies or particularly experiences with this setup.