Saw him the the telly the other night reassembling a Japanese electric guitar, but more importantly I now know how to spot a JIS screw compared to a Philips. The answer is to look for a centre punch mark on the screw head. I wonder how many rounded off screw heads have the mark on them?
For those reading the above and thinking WTF is a JIS screw the below pic shows how to identify the different types of Phillips screws!