I’ve cut my finger once badly because of pocket lint between tang and external stop pin, so I don’t mind the internal pin and tang cut-out. Of course I like the thumb stud / stop pin combo of the XMs better when it comes to sturdiness.
I don’t have the X, only Fulltracks with similar construction. Now, a Fulltrack with brass washers only would be perfect. The tri-way blade cutout next to the stop pin cutout makes the tang even weaker, and I could live without it.
Note that the Fulltrack - compared to the large XM24 has a surprisingly thinner blade (.17 vs .185”), it’s not designed to be more robust. And the X is even thinner (.165”?).