Gravitrax base plates and gridfinity holder

I really wanted to enjoy the gravitrax marble run, but I could not find any base plates that would fit on my A1 mini. So I made my own! The puzzle pieces lock together to form as large of a board as you like. I also wanted to be sure that I could store them in a tidy fashion, so I designed a holder that fits gridfinity. Approx. 20 tiles fit on the holder. Happy Printing!