Does this answer your question Lefty?
Yes it does. That makes interfacing and controlling the actuator a much bigger endeavor. What you want to end up with is a ‘linear’ servo, but if what you have is a just a ‘dumb’ on/off actuator, then you first need to have some kind of feedback sensor on the actuator to know what it’s position is at all times, within it’s total travel range, so the controlling device knows if the motor should be moved and in which direction. Do you have a link to the actuator you are planning to use?
If it is indeed just a ‘dumb’ actuator then I suspect this would be a challenging project unless one has lots of both software and electronics experience, even if just using one of the actuators, let alone 300.
You know a normal rotating servo can be converted to a linear servo with just mechanical linkages, right?