I got the idea for the linear actuator from Troy on a 2" stoke actuator that he recommended for the park brake.
Linear Actuator - Heavy Duty 12 Volt 6" Stroke
Amazon
The aluminum on top of the slider is 3/4" aluminum channel. The hold-downs to the floor behind the radiator are made from 2" steel channel. Both ends of the actuator have 1/4-20 1.75" screws/locknuts securing each end. The piece that attaches the actuator to the aluminum channel is made from 3/4" steel bar stock.
Screw sizes:
5/16-18 1" + locknuts for holddowns and to hold clevice to 3/4" Al channel
92185A583
3/4" Al channel to carriage bolts on slider: M4x0.7 3/4" (I think I cut them shorter)
Grommet:
9307K71
All materials without web links came from Home Depot
Currently the setup is being powered manually by holding the leads to a lawn mower battery and switch polarity to reverse direction.:idea: I'm going to worry about buttons/switches/wiring later. I have a sinking suspicion that it will require a call to Infinity Box to resolve how to make it work.
I don't expect that my heels will be close enough to the base of the assembly to get hung up on the corner of the plate. It all depends on my posture/ergonomics when driving. And I have NO idea how that is going to shake out. That's a big reason why I did the adjustable pedals because I really don't have any idea where I'm going to want them. Also, there is going to be sound deadening and carpet around the bracket on the floor, leaving the bracket exposed. This should come up close to flush with the bracket. I don't see it as being an issue.
Another point is I was very careful not to have any slop in the connections/linkages. I don't want it rattling or there to be any slop at all. So far, it seems I've accomplished that.
The actuator is intended to be for doors, and is a screw design. When it stops, it doesn't budge. Also, because of the tendancy of the slider to bind if you're not applying force directly to the edge of the plate, it doesn't require much force at all to keep the slider from moving. In fact, I have Ballistol on the slide surface to allow it to slide smoothly.
A.J.