I've been running Mavic EX729s with a Stan's tubeless kit for a while now, and after three Northstar trips this summer, the rims are finally on their way out. I could just build up another set of the same rims, but since I'm already running tubeless, I'm thinking of building up a set of 823 rims to save some weight and ditch the Stan's kit. My concern is durability though. I'm a heavy guy (200 lbs) and I ride really rough and rocky trails. Will the 823s be able to take a beating the same way my 729s have? If saving weight means significantly sacrificing durability, I'll probably stay away from the 823s then. What do you folks think? Any input is appreciated. Thanks.