I've got an older system of theirs in my 68 Charger. Controller runs a cable that turns a bell crank that triggers microswitches, one of which triggers a servo for the defrost flapper. It had stopped working, I unplugged it, plugged back in, started working. Problem now is in the non-defrost modes the servo keeps thunking as though it's not quite at it's limit. I loosened up the servo in the bracket and the bracket itself but that was still not enough slop to get it to hit it's limit. There appears to be a set screw on the shaft, but can't tell for sure if it's a through pin, hard to get at under the dash.
Anyone happen to know if that is a set screw that can also be adjusted to set the motor vs the flapper shaft?
Instructions on the site now are for a completely elec controlled set up completely different than mine. Of course I can call them Monday, but was trying to get this done so then I can put my shifter back in the car.

Thanks