What size Allen wrench does the Roscoe bridge use for raising and lowering the action?
1/16”
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What size Allen wrench does the Roscoe bridge use for raising and lowering the action?

. . the stock Roscoe Hipshot A bridge has a radiused bottom plate. . the saddles bottom out at about .060 per string on the 12th fret. The "regular" Hipshot A style bridge is identical, but has shorter base plate, allowing lower action. It's lighter weight with smaller base plate, and steel saddles (vs brass on the Roscoe). Tone difference in brass vs steel is negligible, IMO. Here's a photo: Roscoe style on left. Regular on right: View attachment 4168152
Maybe @Joe BassPlayer will be able to give you some details on a Hipshot A bridge (replacement) that doesn't have the Roscoe neck radius contour built in, affecting string heights. It could be an alternative to a neck-pocket scribe at the factory, or DIY shim.
Also, here's a great recent club post from @donahue, with photo:
Maybe @Joe BassPlayer will be able to give you some details on a Hipshot A bridge (replacement) that doesn't have the Roscoe neck radius contour built in, affecting string heights. It could be an alternative to a neck-pocket scribe at the factory, or DIY shim.
Also, here's a great recent club post from @donahue, with photo:
Interesting. Yeah I'm getting nowhere near .060/inch at the 12th fret. It's more like 3/16ths (.18). Something is wrong here. I'd be happy with .060.
I had the issues of the fretsprout- could dry weather shrink the wood so much that this could happen? This is a relatively new instrument that never left the coastal NC environment until August.
I also replaced my Roscoe-Hipshot A bridge with an off-the-shelf Hipshot A bridge to eliminate the super thick base plate height. Great results, and an easy drop-in replacement. I went with the brass since there was going to be 'less mass', but I think it weighs more than my original Roscoe bridge.
What, no pin router?+1
Yeah. I purchased stock Hipshot Type A bridges off of Ebay, Bestbassgear and Reverb and installed them on several Roscoes and they worked great. Super low action. You'll need the one with .708 spacing (which is of course tweakable).
You can get them from Hipshot but I found them less expensive on Ebay and Reverb.
5 String A Style Bass Bridge
Hipshot A Style 5 String Bass Bridge - Black / Aluminium / .708 | Fat Bass Tone, LLC | Reverb
Hipshot A-Style Brass 5 String Bass Bridge - Black - .708" 18mm Spacing - Best Bass Gear
NEW - Hipshot 5-String "A" Brass Bass Bridge, BLACK - CHOOSE YOUR SPACING! | eBay
+1
Yeah. I purchased stock Hipshot Type A bridges off of Ebay, Bestbassgear and Reverb and installed them on several Roscoes and they worked great. Super low action. You'll need the one with .708 spacing (which is of course tweakable).
You can get them from Hipshot but I found them less expensive on Ebay and Reverb.
5 String A Style Bass Bridge
Hipshot A Style 5 String Bass Bridge - Black / Aluminium / .708 | Fat Bass Tone, LLC | Reverb
Hipshot A-Style Brass 5 String Bass Bridge - Black - .708" 18mm Spacing - Best Bass Gear
NEW - Hipshot 5-String "A" Brass Bass Bridge, BLACK - CHOOSE YOUR SPACING! | eBay
Interesting. Yeah I'm getting nowhere near .060/inch at the 12th fret. It's more like 3/16ths (.18). Something is wrong here. I'd be happy with .060.
I had the issues of the fretsprout- could dry weather shrink the wood so much that this could happen? This is a relatively new instrument that never left the coastal NC environment until August.
What, no pin router?![]()

Perhaps this and a neck shim? With my local guy it would be cheaper to buy the bridge and have my dude put it on and shim the neck.
Seems weird to me that this is an issue. Especially since my fretless, with the old "newer" style wilkinson bridge, has no problems getting super low at all.
What, no pin router?![]()

Just don’t request a new neckWay to wake me up Fred!
After reading your entire post I'm thinking the pin router is your solution. It sounds like the neck pocket angle is incorrect and needs to be scribed. My Signature was the same way. The only way to get the action down was to use a shim (and that's just not the best way unless you use a full length shim; like the ones that Stew-mac sells). But who wants a shim in a $5000-7000 instrument?
Send it back to Keith and let him work his magic with the pin router.
Although the new bridge might solve your issue without a shim. It just really depends on how low you want the action.
Just don’t request a new neck![]()

Way to wake me up Fred!
After reading your entire post I'm thinking the pin router is your solution. It sounds like the neck pocket angle is incorrect and needs to be scribed. My Signature was the same way. The only way to get the action down was to use a shim (and that's just not the best way unless you use a full length shim; like the ones that Stew-mac sells). But who wants a shim in a $5000-7000 instrument?
Send it back to Keith and let him work his magic with the pin router.
Although the new bridge might solve your issue without a shim. It just really depends on how low you want the action.