.... I did remove front bump of Res-C for a smoother transition to the metal guard on one of my S5s. .... and I agree that it really does improve the handle ergonomics. .
<img src="/ubbthreads/images/graemlins/thumbup.gif" alt="" />
..... It also loosened the (kydex) sheath retention, but I believe the knife is still held adequately.
Yeah, many mods affect standardized fitted kydex sheaths. You need to have a more generic leather fitted sheath or have a custom fitted leather or kydex sheath after making mods.
I modify so much that I rarely buy kydex. Plus, over time with sharpening, re-profiling and such, the blades often get loose in kydex. But, most don't get as carried away as I do. <img src="/ubbthreads/images/graemlins/blush.gif" alt="" />
.