Covertec Belt Clip - Dual Mode

I have four light sabers with CoverTech knobs attached to them and several styles of CoverTech belt clips that I use with all of them. The machining quality on this belt clips is excellent and I love the dual use nature that it provides. But none of my CoverTech knobs will slide into the provided vertical slot. So, for that purpose it is essentially not usable, which is sad as I like the look and feel of this belt clip a lot. It will probably end up in the sock drawer as a lesson learned. Basically the slot flanges are too thick and the knob won't go into the slot.