JPG wrote:FWIW, the blade mounting 'fixture' is a bit of a bachelor item. Only bachelors have the time to devote to using it.
Sheesh, what does this mean and how does it help?
Just to put some facts into the discussion in case someone comes along and has the same question:
Older scroll saws have an archaic blade mounting systems with a support post behind the blade. I found it impossible to make this blade mounting system work correctly.
I purchased the upgrade kit and all is well. There isn't any post behind the blade and the quick release fixtures work well and allows repeatable tension settings. If you look at modern scroll saws you'll see they are the same as the newer Shopsmith scroll saw, no post behind the blade.
If you have an older scroll saw with the allen head blade attachments and the post behind the blade do yourself a favor and spend the money on the upgrade kit.
1986 510, jointer, bandsaw, belt sander, scroll saw, jigsaw and lots of accessories. Shopsmith woodworking bench too!