I don't know if that was someone else's experience or mis-remembered from mine? I fitted both licensed and USA Hipshot lightweights to my BB425 (Yes, I know, why twice? ) and licensed ones to a BB5000. Both were the 1/2" size. Both are the same size and neither lined up with a hole from the old tuner. Nearly, but not quite. Without going to the bother of plugging, glueing and re-drilling, I just made new holes far enough away not to crumble into the existing ones - hence the tuners now being at a rakish angle but work perfectly like this. The shaft itself does not fit tightly inside the headstock holes but once the strings are under tension it doesn't really make any difference as it kind of sorts itself out. Well worth it for the weight saving, I would say. Also the balance on the strap is much better.