I took a trip down to a local bike co-op today and found some old XT cantilevers I'm hoping will help solve some reach issues. The shop didn't keep the springs and other small parts with the arms, so I grabbed a bunch of stuff that looked like it may work together and some extras. But now I have a bag of parts and springs and arms and I can't quite figure out the design, so I'm wondering if anyone has pictures of how the springs go into the arms, and how the plastic washers fit over them on either side, or if anyone could just tell me what the parts are and how they fit together.

Oh, these are BR-M734 and 650, which look identical to me in every regard.

Thanks.