I just got my first mech which is a hcigar nemesis clone. I put my KFL+ on but there was a gap so I took it off and was trying to adjust the pin but it won't budge. It seems the pin is screwed all the way in so I can't get a decent grip on the screw. Should I use a flathead screwdriver to turn it from the top? Didn't want to before I asked in case it's not a good idea. The pin is stainless steel if that matters.