I'd like to take my executive desk ( now sewing table) and cut out a piece of it to use as a support for my sewing machine. I want the sewing machine support able to lower the machine to table height, which would enable me to have everything level and I'd be able to sew faster. I'd like it to be mechanical and not air powered. Support needs to be able to swing back up to table height when machine is not in use and must be able to lock in place.
All ideas and links appreciated