I didn't realize I've qualified for CPS platinum and have been a gold member. Any thoughts on upgrading from Gold to Platinum? The 6 clean and check coupons are the big plus as Canon's service has been great in maintaining my cameras but I'd like to keep my 200 f/2L, 100 f/2.8L Macro, 8-15 f/4L, and 70-200 f/2.8L maintained annually as well. Is the extra $400 cost worth it? Can I rotate my equipment maintenance around the 2 free clean and check I get with Gold?