Filter holder with adpater for screw filters

Filter holder for 77mm lenses and 100mm filters. And an plate to adapt 70 screw filters to a plate that can slide in teh holder.
Filter can be stacked by adding blocks.

I used small 3mm inserts, 4mm in outer diameter and 4mm height

The holder clips to a adapter ring
https://www.ebay.com/itm/77mm-Metal-Ring-Adapter-For-LEE-Cokin-Z-Hitech-4x4-4x5-65-4x5-Square-Filter-Uk/401587927897?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649

and an UV filter of which I removed the glass