I have a 2005 Yamaha Road Star XV1700. It has stock hand grips and I attempted to replace with ISO grips. There are 2 screws holding the switch on the bike. look like Phillips screws when in fact they are JIS screws. Japanese Industrial Standard. I attempted to remove with regular Phillips. Could not get them off. Tired impact screwdriver, still no luck. bought a set of JIS screw drivers...that didn’t work since now the heads are pretty well destroyed. Any suggestions other than drilling the head????