[kyleb]

Sorry for the delay, been a little busy and haven't had a chance to check the board. My failures were at the bottom attachment to the floor. I have attached a picture of my current fix, I used a combination of plywood and aluminum plate.

Spreading the load over a larger area like you have done is the right way to go. Without the aluminum plate, the load of the actuator mount exceeds the strength of the wood - as you have found. The further away from the pivot, the less force is on the screw/ wood interface.