i like the idea of that jig but the problem is it only works for that one model of tuner and there's no guarantee fender won't change it in a year or two
fender has been using two-pin mounted tuners since at least the mid-80s, has gone through what seems like a half-dozen different variations, and
none of them are compatible
my '96 american standard P came with these massive boat anchors:
the best thing i ever did for it was to lose these and put the lightweight "boron" keys on:
they did
not fit, i had to locate and drill new recesses for the pins
fender then went to a new lightweight version, like this:
pretty sure these don't fit either of what i put mine, and i don't know if they fit what fender uses now either