Yes, I am aware of that. Or at least, somebody else told me something like that too. The Potts ones used to have a concave tapered section near the dropout. With my fork it is a flat. The eyelets are an addition on request. The Phoenix frame has the same too. The former owner used it as commuter in and around the city of Utrecht. Pottser sold it him 1.5 decade ago when working at the single one shop in Holland that did WTBs.