I am preparing to assemble a 4 string J style fretless bass from a USACG body and neck. I have not purchased a bridge yet. The bridges I was considering are as follows: Gotoh 201: I have read that the plate is thicker and the saddles are large which may require a neck shim. Hipshot A or B: These sound like good candidates, but I am wondering how thick they are on the bottom. I like the idea of them being made of alluminum for lighter weight. (My fretted Warmoth with a Gotoh 206 is pretty heavy.) Fender stock style The body is used by the way and has already been drilled for both stock Fender and Hipshot. Does anybody have any insight as to which bridge would most likely NOT require a neck shim and be lightweight at the same time? Thanks.