The neck on my MB-5 is bowed, to the point where the truss rod can't fix it. As far as I know the best fix is a new neck, but I don't know what necks will fit the thing. It's a 4-bolt, 22 fret overhang neck...complete specs in the link below if they are needed. As far as I know this has exactly the same dimensions as the old Fender MB-5, but I haven't been able to find much info on either one... http://www.zzounds.com/item--SQU328005 edit: Maybe I could look for a used one from the same type of bass? I looked a while back and didn't see any. "Squier MB-5" returns exactly zero results on ebay. Also I've realized that a Fender style headstock would look really bad on this...that puts a damper on things edit again: I found a whole Fender MB-5 on ebay, and it appears the neck is different at the heel...the Squier has no neck plate, and is rounded. It looks the same as the Ibanez GSR series.