[EFastring]

After hearing the 16lb number, we designed an arm that could push down on our bathroom scale ~20 lbs (Banebots RS550, 64:1 transmission, ~15" length). At competition on practice day, we couldn't lower the bridge. We thought about adding weight to the end of the arm, but decided to swap to a locking wedge design instead.

A window motor at that arm length puts out about 4-5 lbs.