@Scottrb1: Welcome to the forum
I'm a bit confused about your question? Your Rolex 3135 seems to be running -2 seconds a day ......?
Seems to be running, or does it run -2 sec a day on your wrist? And in which position does it run -2 s/d? What about all the other positions? The same counts for the beat-error.
A beat error of 0.4 - 0.6ms is, according to the information I have, within specs, so is the daily rate when taken over all the different positions
Then the question whether you want your watch to be opened? It depends on who does it.... If it is an official Rolex service center, and they deem it necessary to make adjustments, then they will replace the O-ring and test the watch for the required water-tightness. Make sure however, it's an official Rolex service center. I have bad experiences with Rolex dealers with their own watch-repairers.
Then the next question; what accuracy are you after? Quartz precision? -2 s/d on your wrist seems for a mechanical watch reasonable/pretty good and if the watch runs -2 s/d constantly, then don't worry too much about the small beat-error ..... it doesn't hurt the watch.
So, yes, many questions open .....