"Normal"? Quid est veritas? To recite summarized Rickenbacker truss rod history:So I'm thinking of turning the key (finally) on a Rick 4003S.
After I saw the new bridge I was excited but the idea of a normal truss rod would make it a no brainer move for me.
1) Back in the dark ages (before @ 1960), some Rickenbacker instruments had single truss rods. The experts on rickresource.com can tell you which models and when with better details (along with a few short scale instruments that may have had single rods in the meantime).
2) Rickenbacker has had double truss rods ever since then.
a. The originals were "hairpin" shaped, and had to be set with the neck pre-flexed to position, then the nuts tightened, so the rods would not rotate and pop the fingerboard off the neck.
b. Since the mid-80's, Rickenbacker truss rods have been "conventional," in the sense you can adjust them just like any other truss rod, although slightly loosening the strings and helping the neck a little has always been recommended.
3) This recently released Cisneros bass is the first bass where a full-sized instrument of any kind from Rickenbacker that has had a single truss rod (at least, as a standard production item) in literally over sixty years. We'll all see how it goes. Several of the forumites on rickresource.com have purchased one; there is a thread on them; and you can see what the comments are, yea or nay, on the bass generally, not just the truss rods.
4) I am not going to discuss relative merits or demerits of single v. dual truss rods. Please take that discussion to another thread. This thread is about what the factory is doing now.