Nice! I have a NEIPA in the fermenter that gets kegged today. Unfortunately, the used freezer that I bought died so I am in the process of a new build. I'm not sure you remember, but I glued the collar onto the old 7.2 cu ft keezer, and I was hoping to cut it off and re-use it on the exact same freezer model, but no such luck. That dang Gorilla glue caulk adhesive is serious stuff! It worked out for the better though because I picked up a great deal on a 7.8 cu ft freezer that was cheaper and holds at least one more keg and maybe two. It'll be nice to be able to have extra on hand for the bigger parties we do here (Christmas and Black Eye Susan Day). This time though, I am going with the build you did and made a removable collar. It'll be finished before the stuff I keg today is ready for drinking next weekend. Here's a pic...
What are you brewing today?