just installed HS6 on TR6,new from Moss in England.no instuctions had to make linkage etc. anyhow,seems jets have to be lowered quite a bit to get proper mix,confirmed by colortune,this then pushes thechoke linkage downward raising the idle speed,as the coke link is connected to the jet, as choke is activated jet is lowered.....min speed 1000 rpms....would like to have lower idle speed..anyone know the correct needle jet combination.... confusion on needle placement in piston..as it is spring loaded and has some adjustment....holder flush with piston or all the way up or down...manual says flush..that places the needle down..and jet down to get proper mix....any help on set up of Su would be a great help....thanks jwc