Does anyone have any idea why Shimano would produce the XTR caliper with a pad axle (the small bolt that keeps the pads in place) that requires a flathead screwdriver to remove and install? I have 4 bikes in the house, have worked on probably 30 others, and have NEVER seen a flathead bolt on a bike. What on earth were Shimano thinking? My only guess is that the pair of them might save 1 gram compared to hex head equivalents, and from where I sit that's a really bad trade.