Just found this old thread via search and am super stoked to see that it is possible to convert this bike as I have the same bike in stock form. jcufari what fork is that up front? It looks like a Surly but which one?
its the surly pugsley non offset fork. so it has a regular front hub. I would not suggest using a 26" rear rim. I had problems with the tire rubing on the chainstays. I have a 29" flow with a 2.4 mountain king out back now its awesome.
I did recieve the cog. It broke, the aluminum pins sheared. He told me to send him back the pieces and a long time later he sent me a cog back that had my steel teeth mounted on a new hub interface. I have not remounted the cog.