Singlespeed parts swap...part IV

Had a friend make me spacers that were the proper size and installed them on the back side. This allowed me to mount the fasteners flush to the cog which just looks better.

I still have a problem with a dull knocking noise that sounds like it's coming from the rear hub but could be that the new chain is not meshing with the slightly used rear cog. I am going to bring it in tomorrow to have the headset replaced so I'll see if I can have a new rear cog ordered too. The chain line seems to be off ever so slightly and I have adjusted it as much as I can. It should work fine and I don't think this is a cause of the knocking.