When I was at the Minnesota show, I bought five sets of these perches. Not wanting to carry them on the plane, Mike Nichols boxed them up and sent them to me. Thanks Mike!!
The perches fit all my cages and the birds are enjoying perching on the various size branches. With the washer on the outside of the cage and the second washer on the inside and fastening the nut, the branches are very secure.
I think it would be fairly easy to make these. I look forward to shopping at the National and seeing what new jewels I can find!