http://personal.nbnet.nb.ca/mccorp/4000seriesbridge.html
I just replaced the original intonation screws with black hex slotted screws of the same dimension which can be easily turened with the bridge height adjustment wrench. Intonation adjustments are easy with these screws. No need to mill the teeth notches of the tailpiece, which is a non-reversable mod. No need to lower the mute pad when adjusting intonation either.

