In terms of tone, I would be more worried about the Aguilar not sounding anything like the original preamp. I am pretty sure that any luthier worthy of the name would be able to address the truss rod issue.I wonder if that’s a common problem. My truss rod seems to be maxed out, too. I’m hoping my luthier can do something about it when I get the bass to him about the neck.
Regards,
Wayne A. Pflughaupt
Ecclesia: Unique Arrangements of Hymns, P&W Standards, and Original Tunes
Administrator, Pedulla Club #45
Administrator, Official Tobias Club #133
Fretless Club #943
Big Cabs Club #23
My Rig: Stage and FOH Friendly
My Basses
Years ago, I replaced the fried Fender preamp inside a Precision Lyte bass with an Aguilar OPB-3. It was cool because you could have a passive tone control as well as the active ones. The Lyte is actually one of the two basses seen in my avatar. The Lyte is now long gone, as I started playing more fretless and more 5 string basses. No regrets although it did have one of the fastest necks I have ever played.