I have been doing some light portrait and wedding work on the side. My rig includes a Canon 20D, 28-70 f/2.8L, 70-200 f/2.8L IS, 100-400 f/4.5-5.6L IS, 580EX, ST-E2, 2GB Extreme III, 1GB Ultra II, battery grip w/ 2 BP-511A, tripod, monopod, etc. I believe I have a very good setup for this type work. The only thing that worries me is a body failure. I would hate to ruin a wedding. Do I need a second body? I haven't read many stories of body failures. I get the occasional error but a quick battery shake or lens reseat fixes that. Is a body failure a rarity or something I should invest in protection against? Thanks.