Me Too!!! :-) You're welcome.
I especially liked the schematic of the tension unit, is appears to
be very similar to my 401As, and I take them apart for cleaning
occasionally. Getting all the bits back together in the right order
My machines all have built-in stitches, one just changes the two
dials. It does have some "Special" stitches available only with
cams, but I almost never use them. I learned to sew on my mother's
(unknown model) black-with-decals Singer. There was a zig-zag
attachment which whipped the fabric back-and-forth. ;-O
Her first zig-zag Singer, about 1950?, had cams for every zig-zag
pattern, mounted on the front of the machine. She even had her
salesman contact Singer to create a cam for blind stitch hems,
(--^---^---^---^-- imagine that rotated 90 degrees to the left)
which was not one of the standard cams at that time. I wish I had
not given it away to my aunt.after Mom died, it was a great machine.