You're off to a good start, Don.
When you get ready to move on to the finer points you might find some value in checking out my Open Back Banjo Design Primer.
Are those SINK CLIPS, tensioning the head?
If so, THANK YOU for solving my problem of finding a substitute for relatively expensive brass shoes & J hooks.
It's a good start with some interesting features. I'd like to see the back and some closeup shots of the head mounting brackets.
On your next build, I believe you should concentrate a little more on your fret positioning.
'Roll the Old Chariot' 5 min
'Gourd?' 10 hrs
'Early Nitty gritty B,G.' 12 hrs