Hahahahhahahah

Thats awesome. Sorry it irked you though.

I use a large Sackville Saddlebag from Rivindell. Its about 30 liters and holds almost everything I tour with. To my knowledge it is the largest Saddlebag made to work with the brooks saddle. I always over stuff it. It has never had a problem and neither has the Brooks saddle. I would guess that my rear bag weighs between 15-20 pounds. Not too sure really but that includes my sleeping pad, cooking stuff, sleeping bag, tent, and food. Oh ya, tools and clothes usually go in there too. It does use a rear rack to support some of the weight as recommended by Rivindell. However, I believe that is merely to support he bottom of the bag from sagging into the rear wheel and to help prevent swaying.

Really, I doubt you could find a bag/gear combo that would really overload the brooks. Unless you are transporting uranium or something...