Scaled this up for my 77mm thread lenses, and fits perfectly at 1.33 scale on x and y axis. I printed with support on the ring, but none on the mask. Had to file down the gaps to get the ring into the mask, but really I didn't even need the ring, the mask just fit into my front element without it well enough to set focus. Will test it out tonight!
Scale 1.33 on x and y axis for a 77mm thread.