I had some done. But the spring can rust right away. as they are only polished and plated closed. As and such are viewed as spread open. I just wanted to toss that out there.
I made 3 sets of rods up. Just bent simple stock to place where the springs go. light open halfway and fully open.
I would also put a few coats of car paint type wax on the hinges as well to prevent rust as well as they do rub when used.