Leica Rangefinder Polarized Filter Holder

This is a polarized filter holder I designed and printed for my Leica M6 and M9 rangefinder cameras. It holds a 77MM polarized filter and fits on the end of my 50mm f/2 Summicron lens. Filter thread diameter: 77mm, Lens diameter end: 47mm. Clearances permits pressure fits of filter and on lens and can be removed easily so no screws, clamping, or other scratch inducing mechanisms are necessary! I've please a slot on the outside of the flange so that the filter effect can be seen while twisting the filter within the ring. The holder is small enough to clear the focusing square in the viewport - so focusing obstruction. This same design could be adapted easily for for other lens sizes. I designed in in Fusion 360.
Printing note: I printed it with the lens side (small diameter) facing the bed and used support.