O.K. I believe I now have a really good idea of how the 6PI system works on our cars...I even searched and found a dyno sheet (I'll try to find the link again...) that reinforced keeping this system functioning...

A lot of us have modified exhausts (and even if it's stock, flow will slightly change over time).

Wouldn't it be nice to have someone make adjustable actuators? All it would take is to incorporate an adjustable spring into them with an external adjustment or something similar (I'm thinking like coil-overs or adjustable shocks).

I have had actuators in my hand and they do have a spring on the opposite side of the rods, but it's been a while. I guess I have to visit my friends car parts room