20 Gauge shotshell holder

I made this similar to my 12 Gauge shotshell holder for a friend, He has a 20 Gauge and wanted shell holders for it. I have not printed it for him yet, and dont own any 20 shells to test fit with, but I got the specs for the casing from Wiki and added 0,02% so shells will fit inside.
I will update with any changes when I print and have a shell casing to work with,