This problem is a symptom of a bigger issue - general interoperability, or more precisely, lack thereof. Some of the Incra stops don't even work on different Incra products (LS fence vs miter gauge). The flip stop on my Incra miter gauge (1000HD) works great but doesn't fit the LS fence. Do those development teams actually talk to each other? I make a lot of stopped dados on my router table and a flip stop would be very useful.
My experience with various stops has convinced me to just make my own. I use 6/4 stock to make blocks and drill a hole at the right place to go into the T slot. But I'm still pondering how to make a usable flip stop for my LS. The flip stop on my Incra Miter gauge is actually pretty well made and works well on the miter. But, it has an "incremental positioning rack" that makes for 1/32" aligned positions. While that's supposed to be a feature, it's one I find more of a pain to use than not. The whole point of a flip stop is to be able to get the stop out of the way without removing it, not sure the incremental rack adds anything. Because of the rack, it doesn't fit anywhere else.
Measure twice, cut once and CROSS OUT THE WRONG MARKS.