I am disappointed that Cybex no longer supports their model #535. I have a problem with mine. When I press the down arrow & the elevation is at 1% or higher, the elevation will go all the way to the top by itself. The same holds true when pressing the STOP button. The elevation will go back down to 0% the following day when turning the treadmill back on.
I have replaced two overlays, one elevation motor assembly and one elevation bracket.
The belt is still in great shape even after 6500 miles of use.