I’ve dremmeled them once and can keep,doing it, but the most recent second hand RS fork purchases with the 20mm axle, that’s the one the my LBS had a problem with too, not sure if the issue is with the maxle, or the thread on the fork, but you need to tighten up the maxle “tight” to elimate play in the front wheel, to the extent that it is damn hard to undo.
FWIW I’m relatively mechanically sympathetic and don’t over tighten these things.
On my Prophet with the 15mm maxle, it is only the last few punctures where the shoulders have bent, and that’s after 2 years or so, and the forks were 3 years old when I bought them. I’ve had a lot of punctures too, I really should have gone tubeless by now.
£39.98 for the two sounds like a deal :)