I needed an alternative spool holder for my Bambu P1S because the stock one made it nearly impossible to change filaments without having to completely move my machine since i have it almost flush with my wall, so i came up with this design, its not perfect but is functional. I use it when i'm printing but it can be used as a general wall holder. When slicing adjust the scale of the x or y axist to 101.6, that'll make it full size (4x4x3.5).