After experimenting on a scrap piece of FasTrack, here’s the finished version:

As seen from trackside.

View showing slot cut for actuator ramp and notch cut for base. Note that the base and the ramp aren’t connected; you could enlarge the notch and put a shim under the base, if desired.

Underside of the FasTrack section, showing slot, notch and crosspiece removal.

With the actuator in place. Test cuts on the scrap FasTrack can be seen in background. I may need to wash some of that ‘patina’ off the 3376 car. ![]()
Hope this helps!
Mitch