I think Janey posted this to the wrong thread:
Good point, bkay. I think the youtube videos that I referred to previously do not show the release pin. Those do sometimes get gunked up and do not work properly. A way to check the upper tension can be found at
https://www.youtube.com/watch?v=WxtQO2XSB4s
Janey - Neat people never make the exciting discoveries I do.
Not affiliated with off-site link(s)