I am just starting rebuilding a Colt 8 and have downloaded the manual , thank you. Had good look at it and most looks faily staightforward but I am preplexed by a length of chain hanging from the rear of the cutter deck. The exploded drawing in the manual (SPV-28) shows the chain but there is no information about where it is attached, how it is adjusted or what it is there for? Any hints please. Cheers Mungo