I'm replacing the shifters on my MTB and I managed to strip one of the little hex bolts on my ODI lock on grips.... not sure exactly how I managed to do it, but now the right sized hex key won't work and the size up in english won't work either. I tried lubricating the grip to get it off the bars and deal with it under less stress, but to no avail and tried lubricating the screw to try and loosen it up a bit, but it didn't help. I have a replacement bolt, so I have no need for this one, but I do want to get the grip off to put on the shifter, and I'd rather not have to buy a new locking ring.
Any ideas? The area is fairly small that I have to work with, I don't think notching it would work because i can't get to one side to notch that side of the screw, and I doubt drilling it out would be good cause I want to keep the threads on the grip.