John, you are absolutely brilliant - an artist and a craftsman. Are you an engineer in real life?
I hope you decide to make these and offer them for sale! Get your patent.
There is no way I could ever get one built, but I know I need one. It's so difficult for me to tip, tilt, and flip my machines around while trying to clean, oil, and learn about them. The more I learn on this board, the more investigating I have to do.
Just to go with the "wish for it and it may appear" theme ... I would like to put in my dream order right now for one bench top model complete with baseboards for a 1954 Singer model 15-91, a 1952 Pfaff model 130-6, and a 1975 Singer Fashion Mate model 252! I think they could all use the same baseboard, but I'm not certain. I could skip the Fashion Mate one if necessary.
I can wait, years and years if necessary, but I need one.