Did fine on my Sebenza and Umnumzaan. Since the Insingo is more of a modified wharncliffe blade, it should be fine so long as you follow the curve and don't pull the tip off the edge of the belt. You can tilt the handle down when starting near the heel if you're really paranoid about that thumb stud. I personally say it's fine so long as you don't try to reprofile to a low angle, which I wouldn't recommend anyway since the soft heat treat likes a 20 degree per side angle better.