Reply with QuoteLook for the older screw driven or commercial door openers. They have the longer one piece screws where the newer ones are sectional.
I once thought about how to support a long screw and had that same idea for a push/pull setup where the gantry would pass one way and knock one side down while lifting a support at the rear of the gantry at the same time via a small cable connecting the two with simple roller guides. The supports would be U shaped to cup the screw as closely as possible without putting it in a bind. Something to consider but its only been on the drawing board in my mind so far for me
Look for the older screw driven or commercial door openers. They have the longer one piece screws where the newer ones are sectional.
If it's not nailed down, it's mine.
If I can pry it loose, it's not nailed down.
