I traveled with someone that got his Co_Motion Americano Co-Pilot into the case, I do not recall if he had fenders. He said that his frame was so solid that his bike handled fine without a front rack so he only used a rear rack and huge rear panniers. That bike is a solo bike but it uses tandem wheels with a wide rear spacing and it still fit in the case.

I am in the process of putting together a 26 inch wheel coupled bike. The manufacturer of my frame said that I would have much better luck fitting everything if I plan to pack the fork in my other luggage. I am assuming that I will not travel with fenders however those cheap clip on fenders might work well enough for that. For a rack I do not yet know if I will need the folding rack from RackTime or if I can fit a regular rack.

Great video but he uses 5 couplers including one on stem instead of the normal two. Huge frame, but it is a racing bike and no racks or fenders. The fifth coupler on the stem I am sure is more for convenience than necessity, I suspect that coupler is only because he might be frequently packing up his race bike.
http://www.youtube.com/watch?v=Ml5ZsuEdqOY