Do the chain as short as you can, so round the big cog to the point you can join it not through the derailleur, then add 1 pair of links, as per Shimano's instructions, then use the b screw to get it as close to the cassette as possible in the biggest cog but without it fouling when changing between second and first gear.
Do the chain as short as you can, so round the big cog to the point you can join it not through the derailleur, then add 1 pair of links, as per Shimano's instructions, then use the b screw to get it as close to the cassette as possible in the biggest cog but without it fouling when changing between second and first gear.