Wondering what progress? I think I saw a post where you had this further. We considered making one. The advantage I felt was making it a harder to recognize safe. My Browning safe is really pretty, expensive and sure is secure! But is really clear what is there.
My lovely Browning purchased guncase is pretty much filled. The modern version of a treasure chest. Mine has really nice artwork, etc., but there are getting to be some pretty nice rifles that are kept in other places. The odds of freeing up my son to handbuild one is also declining!
LOL, I just bought another Liberty and moved my ammo into it. Now I have room for all my guns including the new one I just bought.