This is a digital (CD disc) copy of the original Simons UDX-60 Forks Manual from October 1982. It was the first manual produced by them and there's a copy of the original letter to me included. It covers everything from a complete teardown, to seal replacement and damping alterations. It also includes part numbers and set-up information. Cost is $20 with free shipping in the US. Get a free upgrade to priority mail with purchase of any other item in the store.