I have been having issues with my hub break arm grinding against my 36t sprocket bolt heads and I've already gone through 2 of them. I have been searching different forums trying to see if someone has a good solution. At last I found this AWESOME website where they custom build a hub adapter that attaches directly to the center of the hub between the spokes so that the sprocket is flush with the wheel. The adapter only has 3 bolt holes for the sprocket so you don't have to "sandwich" the spokes and install 9 or more bolts, nuts, and washers. I told them I was planning on getting a 32t sprocket as well but I am concerned there adapter wont match up and they said they can fabricate that as well. 
The adapter + sprocket + shipping came out to $71
Here's their link:
http://www.mmbikeparts.com/sprocket_adapter.htm
If you click on Q&A they have a cool installation animation that shows you how it goes together.
The adapter + sprocket + shipping came out to $71
Here's their link:
http://www.mmbikeparts.com/sprocket_adapter.htm
If you click on Q&A they have a cool installation animation that shows you how it goes together.
