A few weeks ago several of us had discussed changing out the proprietary Roscoe Hipshot Type A bridge for a standard Hipshot Type A bridge in an effort to lower the action. The Roscoe proprietary bridge has a varied staggered thickness of the bridge base that each bridge saddle rests on. Keith told me that this was done in an effort to allow the entire bridge saddle to contact the bridge base (for maximum sustain). The problem with this design is it can greatly affect your ability to obtain extremely low string height (depending on the angle of the neck pocket). This issue was corrected by Gard and Keith quite a few years ago (by changing the neck pocket angle) but basses built prior to that tooling change would need the neck pocket scribed in order to obtain real low action.
A few owners solved the problem by changing out the Roscoe proprietary Roscoe Hipshot Type A bridge for a standard Hipshot Type A bridge (the standard Hipshot Type A bridge has a much thinner bridge base plate and is more of smooth large radius).
@donahue mentioned it here:
@scubaduba recently asked some questions about it too (before changing one out on his LG. Custom with good results).
I knew that I had done it a few times but after thinking about it I believe that all 3 Roscoes that I had done it too were STD and STD Plus basses. I changed the bridge on those basses primarily because I just prefer the design of the Hipshot Type A bridge over the Type B bridge.
At any rate, I recently got my 2008 SKB-3005 Signature back from Keith from getting a Plek and a neck pocket scribe. I sent it with a shim installed and asked Keith to replicate the same action without the shim installed and he did. He re-angled the neck pocket so that the bass set’s up with my preferred action) without a shim).
However, all of the discussion prompted me to go ahead and order a standard Hipshot bridge just to see how it worked out on my Custom Signature. (Primarily because the B and E still couldn’t go any lower because the saddles were bottomed out). Well the standard Hipshot Type A bridge arrived yesterday and I installed it. I can now officially state that with the standard Hipshot Type A bridge I can literally lay the action on the frets (if I wanted to). And I don’t notice any les sustain or negative affect of the tone. If anything, the string angle from the ball end anchoring part of the bridge to the saddle has increased and in my mind that provides a better witness point for intonation.
Bottom line, if your Roscoe Custom plays OK but you’ve always to get the action down a bit but some or all of your bridge saddles are all the way down, this might be the a solution for you (without getting a neck pocket scribe). Just purchase a standard Hipshot Type A bridge w/saddle spacing of .708 and you’ll be able to take your action down as low as you’d like. Now if you haven’t had a Plek or a good fret leveling done to your bass you may encounter some fret buzz if your frets are properly leveled you’ll be amazed how low you can go with your action.
Here’s the one bridge that I got:
Hipshot A Style 5 String Bass Bridge - Black / Aluminium / .708 | Fat Bass Tone, LLC | Reverb