Champanier

I've been working on my Wheeler & Wilson 9 and I have it running (at least with the hand wheel), but I haven't been able to adjust the tension correctly. I tightened the tension nut a lot - many turns. It got better than it was, but still is not right. I wasn't able to get the screw to turn on the bobbin tension and I'm worried about adjusting that anyway, since the manual says it really shouldn't be changed.

I wonder if I need to take apart the tension pulley to clean it more thoroughly.

There's also the little wire (that's usually springy on other machines) on the thread guide and controller, which is in place, but just loose and goes up to the top when the thread goes in. Would that affect the tension? Where could I find a replacement?
[ATTACH=CONFIG]457294[/ATTACH]Photo (very close up - the fabric is just cotton, even though it looks like burlap) is before and after adjusting tension - not much difference.

Thanks for your help!