Has been to Remove all the head cap of the main piece i will use either a disc sander or a belt sander to kiss the head cap or until the finish is off to then Aline it back up with the program dry clamp for a minute or two to get a feel for it tightbond #1 and 2 clamps usually do the trick 24 hours latter like baking a cake unclamp and remove what head cap may remain below the big break usually the area where the head cap meets the nut and truss rod area no big y dose not need to be perfect level enough to re glue the new head cap on after a trim and sanding time for a quick oil dry time take a walk or play my guitar a few minutes pass, wax, assemble, restring and call the customer i did this at a snails pass at home for $90 but i haven't found a sure way to do the back crack anyone to help suggest what i should try to learn to about hiding big cracks in poly and or lacquer what have you learned is there a fast sure way ? do i color it with some kind of fill stick and spray it ?how much time do you spend and what do you charge ?whats the best way ?