I haven't tried shortening them yet, but that sounds like a really good idea. Will definitely give it a shot.
FAD's earphones and I don't seem to get along too well in the ergonomics department. The FI-BA-SS is probably the best fitting among them for me, which is a good thing as it's still my favorite.
Oh! By the way, there are new Widing models coming out in the next month or so I think? The ME10DX seems to have an even higher impedance than the EX, and it now has a FADish type of finish on the housing.
Stock hybrids have too narrow tubes for the FADs and make them sound bassy and congested. If you shorten their stems, their openings will widen as the tubes stretch over the nozzle. They'll still take a slight bit of edge out of the highs, but that's not necessarily a bad thing with FAD's armatures.
Quite intrigued about the new Widings, you know that the 10EX are among my favorite dyamic IEMs. High impedance requires an amp for sure, but on the plus side you get a pitch-dark background, which adds to transparency. A word of caution though, the 10EX is what I'd call a "holistic" IEM, not a phone that calls your attention to detail in the first place, rather something that sounds very "right" as a whole.