I don't think the rear rim failure was braking related. The horizontal crack is above where the brake pads sit and there is a vertical crack in the center of it about 1cm long. I imagine I hit something, pothole maybe, but it wasn't big enough of a hit for it to really register with me as being catastrophic. I'd ridden these over some pretty crappy roads previously without problem. The crack is along where the tire bed meets the side of the rim.
The front brake track was always sort of wavy looking, even when brand new. The appearance hasn't really changed much, there are just flecks of carbon missing. The brake track could have over heated, but I think what you are seeing is just the waviness of the brake track that was there from new.
Not long after I bought these farsports switched to the woven brake track. For the record these were 306 and 308 grams for 50mm tubulars. I think the newer rims have gained a bit of weight and are probably a bit more robust.
If I get the chance I'll get it put back together and snap a few pictures.
I'm not trying to say that farsports's stuff is crap, I know a lot of people are having good experience with them, but I think most people have the newer generation rims. But, I figured I'd show what happened to mine.
The big question is, what to replace them with?