Ok, I have yet another 5/6 port acuator question (last one hopefully). I pulled them off and cleaned up the ports so they work great now. But...on the bottom of each of the actuators there is a screw that I can screw in or out. Now the screw presses up the canister inside of the actuator but it doesn't seem to change the length of the actuator arm movement or anything else. Does this adjust when the ports open??

 

I do believe that is the adjustment screw for the end travel...If you screw with it, your ports could either open too far past the "window" in the side housing, or not far enough.

This is pure conjecture on my part, but due to the location of the screw, and the fact it's not a "bleeder", the options are limited...