I used the capo tip about 8 months ago when I was changing/upgrading my pickups. It can in handy on the partial second disassembly. I changed the strings the first time but while setting the pickup heights the screw came out. I loosened the strings enough to slip the tailpiece off the posts and the capo keeps the headstock in order. Then I was able to loosen the pickguard and put the dang screw back in.

My tech uses the power screwdriver. You just have to watch the string tail whipping around so as to not scratch the headstock. I'm thinking about getting one of the drill winders, but I really don't change strings that much.

Roy