Anyone Regulate their AP?

[srvrf]

I'm not sure many here tinker with their APs, but thought I'd ask. I have an older 25860 that is losing 30 sec/day on a timegrapher (and on the wrist/winder). I've had watches with 7750 movements before and the regulation is a relatively simple task. Moving one arm adjusts the beat error and the other the rate. I think this is the same for the 2385 movement in my ROC (meaning Arm 1 in the picture adjusts beat error and Arm 2 the rate), but I haven't been able to get the two arms to move separately. Moving one moves the other. Has anyone done this?

I could obviously send it in to AP but the movement was serviced to fix the chronograph a couple of months ago although not by AP. And I am waiting for a response from the seller who had it serviced. But if it came down to a simple twist of a screw or movement of a lever, I'd prefer to do it myself at this point rather than send it off again. I don't get it wet since it has low WR, but will grease the gasket when done as well.