In the end I crumbed and bought the halfords 40-200nm one. Figured it'd last a lifetime and I'll get a lot of use out of it over the next 30 years. Only shame is it doesn't do the full range for the CVH so I still need one that'll do 8-40nm but I don't really want to shell out another 70 quid, do you think a cheaper one like this would be good enough for the low settings like the rocker cover?
http://www.machinemart.co.uk/shop/pr...ails/040210674