I've just realised that the clearance under the feet isn't to specs and I'm a bit perplexed. When the foot pedal is pushed down hard the maximum lift I'm getting is 5/8". I've studied the mechanics involved and can't see where the linkages have any adjustments. I removed the pressure adjustment screw to release pressure on the outer foot and when the pedal lifts to its max I can still push the feet up so the travel is there but it's not lifting. I'm still searching for info. Before I start