Originally Posted by AM9000
These work really good. The ones i found in a PC parts drawer were exactly 4 5/8" - By the way... these are computer case slot holders. If you have a desktop PC you probably have 10 or so of these in the back of your computer.
All I had to do was elongate the notch on the small 90deg bent portion of the slot holder to make it fit around the spring attachment hole on the follower. Once that elongated "fork" is placed around the spring hole, insert the spring and presto! you have attached the blocking device... (will add photo)...
As a bonus, the shape of downward facing end is angled in such a way that it prevents it from interfering with the spring.
Anyway, seems to have worked well for me. For permanence you have the usual options...
Then you either rivot or glue these in? I have a TON of these laying around.