Actually, I think the picture Mickey2 was referring to is at
http://www.quiltingboard.com/vintage...t-t275248.html BUT it is for a slant shank machine. ArchaicArcane explains why the needle is not centered in the first post of
http://www.quiltingboard.com/vintage...t275248-2.html
As Cari said, "The needle won't be centered in the hole even when everything is cleaned." I have a 306 service manual that gives a different relationship to the needle hole but still not centered.
Since the above links are regarding the 201 you may want to read the whole thread.
Janey - Neat people never make the exciting discoveries I do.