GMT Master Service Question

[Phil G.]

A few months ago, I had my 1996 N16700 SS GMT Master (Pepsi) in for service, as the watch was neither keeping accurate time, nor staying wound. I took it to a local AD who sent it to Liditz PA for service. The watch was returned twice to them, first because of a cosmetic defect in the internal bezel (replaced) and then due to the fact that after wearing it for 2-3 days, it would stop after around 12-14 hours. I simply forgot to give it the 40x manual wind before I put it on. Now, when I don't wear it for several days, I remember to manually wind it. It seems to be better, but maybe once weekly, even after winding it and wearing it for a few days, it will stop running in <24 hours. Not sure what my next step should be. I love the watch and paid significant $$ to have it serviced. The AD is on the Main Line outside Philly, is reputable, and has been very supportive. Suggestions?