The liftout section is back in business again. Sturdier and actually better working than before. So in the end it was a good thing it started to malfunction. While I were at it I remade the opposite end as well.
As can be seen in the picture I screwed the track to the plywood. Ought to prevent it from ever moving again. The large screw to the right goes down through the foam and into the benchwork beneath. The plywood is glued to the foam but the screw is there just to prevent it from moving sidewards anyway. Cautions and pre-cautions ;-)