Great thread. As an aside, have you ever looked at the Keith Monks design?. It is a simple but cleverly engineered arm. You might be like to try to implement damping the way they did it - a round lip around the tonearm going into a cup filled with silicone oil.
Great! I am playing with the idea to make a 3d printable turntable. Dunno how exactly since my printers do not go beyond 220mm x 2200mm, but i am pretty sure it is possible. I have just recently began thinking about it since i make so many replacement parts with my 3D Printer.
Sorry to revive an older thread. I wonder if it's possible to find a 3D printed tonearm rest for a Technics SL-1200 with Mayware Formula IV? The top part of the catch has been long gone.