I've been looking at the E-stopp kit so far which has good reviews. I saw some complaints with the speedway unit.
Jason when I clicked on your link I also came across this on ebay
https://www.ebay.com/itm/31358938075...QAAOSw8bZg3zQX
For just an actuator the camaro one seems to have a lot of wires!!!
dsraven on the E-stopp kit it ties into the ingition on the standard install to that its disabled while the ignition is on