I've not notched one yet, (16 of them on hand) however, this particular hub is a booger! I have a bunch with the sliding axle and have only had this issue with a couple that had jam nuts on both sides inside the fork legs.
Still want to see the whole bike when you can.
REC
PS:
You still spread the fork legs a little even when sliding the axle around. They were made that way. I don't have one of those fancy tools though. My method is a bit more primitive, but works the same way. The easiest fix is to get a fully threaded axle and use it in place of the one that has an unthreaded middle section about an inch or so long. Double nutting the axle to put it in or take it out works great then, and very minimal spreading is necessary.