I will let you all know how my "home made" system works - just have to get to it - lol.
I do have one concern that laurlync brought up. My frame is a Hinterberg with a Voyager 17. Its take up lies flat on the bed of the machine. I am wondering if it will be in the way when I roll up the quilt to advance it if it is in the "down" position. These are not particularly flat or thin. Just thinking outloud here.