I just dropped in to say how impressed I was with Nanda Racing's manual for your platform. Within a few minutes on the web, and downloading/viewing... it's very refreshing to see a company take pride in their product with a step by step assembly manual. Too bad Exceed couldn't do the same. All I found was an exploded view of parts for the MadSpeed platform.
Once you get that hinge pin out, I'm sure you'll notice the flat spot on it... as shown in the manual.