Do any of you Bass repairmen have any experience with Straightening necks that have bowed beyond the truss rods adjustability? I purchased a used vintage neck though bass that I am unable to straighten the neck by the truss rod. When the strings are loosened, the neck can be made to bow backwards with maximum truss rod. (turned to the right until it stops. Any tighter will risk snapping) When tuned back up to pitch the rod tension will not keep the neck straight (or straight enough). It is a bass that is worth saving, but I am not yet willing to spend the $$ to have the finger board removed and a new (more powerful?) rod to be installed. (assuming that it can be done) I am interested in hearing opinions, stories of success or failure and speculation of my chances of success. Also any recommendations and cost of neck straightening machinery would be appreciated. I do have the option of returning the bass for a full refund within 30 days.