Here is a fairly simple repair to a fairly common problem with vintage Gibson basses with two point bridges (three point bridges as well). This 1969 Gibson EB-1 "violin bass" has a classic problem of the silk string windings crossing over the saddles and robbing sustain.
The photo below shows the bass as it came into the shop. The player had unraveled portions of the silk windings to try and remedy the problem, notably on the E and A strings.
Another issue with this bass was that the pickup was physically loose and rattling. This was a simple fix as the cover was removed and another layer of foam was fitted underneath the pickup. The foam supports the pickup while the cover holds it in place. A quick and dirty repair.
So, back to the saddle issues. My customer turned me onto the Webbteca MOD-BAR, which is made by Evan Webb in Columbus, OH. This simple yet genius bar installs without modifying the original bridge and spaces the string balls back enough for the silks to clear the saddles.
The only modification required was to relieve the MOD-BAR so that it would clear the saddle intonation adjustment screws in the rear of the bridge. The photo below shows those saddle adjustment screws, just below the string ball ends.
The bar is held on by string tension alone and now the saddles have plenty of room for intonation. With the silks not coming in contact with the saddles, the strings are able to vibrate free and ring true. Very slick solution Evan!
The bass now plays better than ever. And for you crazy collectors that value originality over playability, this bass can easily be brought back to stock by removing the MOD-BAR. (note the chrome bridge cover and pick guard could be added as well.)
Bassists / guitar tech's looking for a MOD-BAR, here is some contact info. Evan is a great guy and loves to talk shop.