Has anyone contemplated or have experience using the Walthers Bascule Bridge (933-3070) as a swing up gate for room access?  The Walthers web page shows the opening after the approach is 21.5 inches.  I was considering expanding the opening of the bridge using balsa wood to 28 or 30 inches.  I could then use the bridge as the access point to the interior of the track area.  I may have to increase the counter weight and hopefully I would not have to add a larger lift motor.  Thoughts???-