Hi again, Not used one of these specific looms. We use the Langy's (Rebel) 8 Circuit looms (
http://www.langysrodshop.co.uk/wiring_kits.htm) and can vouch for them (They also do looms for 9+3 and 20 circuits) . They will be standard fit on all our turnkeys rather than battling 30+ year old Triumph looms.
As well as being colour coded, they have the feed printed on them every 6 inches! (e.g. Left HL Main Beam, Right HL Dip Beam)