Reviving this thread because I just bought a secondhand Maruszczyk Elwood and it has one of these standard bridges. I was looking to lower the action a bit but loosening the top grub screws on the bridge saddles doesn’t seem to cause any reduction in height. I can’t quite make out if there is a little locking screw accessed from the front of the bridge saddle? Also intonation adjustment looks hit and miss. It’s a pretty horrible bridge TBH and somewhat disappointing given the quality of the rest