I have a Fender MIM Jazz with a broken truss rod. I see a Maple/maple neck on ebay all the time from a company in St. Louis called Magic Dragon. Anybody out there ever seen one of these bass necks? The store sells them for around $70 and they seem to go on ebay for much less. My bass and the ebay neck both have a 2.5" heel pocket. Would this be a simple matter of bolting on the new neck and moving the tuners and nut over? What about getting the neck to body angle right? Is there a technique for shimming the neck or is it trial and error?