Replaced my original bridge on my 4003 with a Hipshot a few months back. Despite the horror stories, mine has been great - until last night! Without warning, the D string saddle moved flat right down, and the string was basically on the fretboard. I then had to adjust it upwards after nearly every song we played. Not a good night! Looked at it just now, and some of the other saddles have moved about as well. It's gone from all okay, to the whole thing going haywire! Online, some have used Loctite Blue, which will apparently let you adjust, without being affected by vibration. Just wondered if anyone else had had similar bridge issues, or can offer any solution?