I just picked up a two body GS-1 system through eBay from a really nice guy on the left coast. Has the rotary prism and the AE prism and six lenses - 50mm, 65mm, 100mm, 110mm macro, 150mm and 250mm. I'd had an SQ system for years but lost it. This is the replacement. Looks awesome - clean, good optics etc. Anything I should know before I break it?