Xcentric - there is a way to add a special washer that BP supplies a 2-3" almost square item with a hole and a cut out in it... probably in the extra parts bucket with the shims you have left over.
The "washer" goes through the pin that hold the ramps on and will keep them from drooping but 2-3" when lift goes up...
I had to use this option to insure I could park another car under the first one without getting out and removing,moving and storing ramps separate of lift (a PIA).
If ya need more deatils - PM me with contact info
Thanks for the tip! I found reference to "optional drive up ramp locks" in the manual. The place I bought the lift from is going to fix me up.