i searched the board with no luck for a replacement neck comparison. i'm interested in comparisons of replacement necks, fit, finish, quality, warranty experience and any other comments, (fender jazz replacements) i'm aware of usac, warmoth, mighty mite if you know of others please include them 2 specific uses convert a mim jazz 5 to a fretless 5 (want to keep the fretted neck, won't defret) help a neighbor's son with a mim 4 with a seriously twisted neck thanks bill