My Final Solution to the Bed Slide Motor Problem
I designed this many months ago, but just got around to implementing the idea.
If interested, there is another thread with my original design drawings. Hopefully with the attached picture that drawing won't be needed.
Anyhow, as the pic shows, I fabricated two strips of aluminum about 6 inches long and about 1.25 inches wide. Bored holes in each one exactly in alignment with the holes in the motor. Those are the upper 4 bolts in the pic.
These new holes are round, NOT slots as in the original support piece. Next install the motor in the proper position (all the way up with the pinion engaging the rack as much as possible) and then add the new pieces. Then tighten those four bolts; no need to overdo the torque now.
Finally, drill the two lower holes thru BOTH the new aluminum "straps" and also the original plate that holds the motor. These two new holes are perfectly round (no slots). Then pass a bolt (I used 1 inch long) thru the new hole and put on a nut and tighten well. Voila!! The motor should be completely unable to ever drop again. If mine does, I'm going to push the slide out until it falls on the ground and sleep on the kitchen floor from now on.