Yup, midnight aroura was indeed the '91. RRp was £850, I picked muine up for £700 in 1992, when the M900 XTR (yellow)team avalanche came out. All above is correct. My only add, is that my M730 chainset and rear hub are stuill alive and in almost daily use on my yeti, I estimate 30,000 miles later. . and still on the original big and granny ring. . M730 is still almost unbeatable in durability . . . 
