David wrote:...if 'road use only' then the LSD will seldom come into play and may just add under-steer so may not be worth it - other may disagree though.
Otherwise I think you've got it about right. Just remember superlights are really track machines
David, disagree with these two points - my 1st caterham was a 1.6 supersport with 135bhp and open diff, and in extreme conditions it'd spin an inside wheel. Not a show-stopper, but an lsd would've been nice.
Also, a well-set-up superlight makes for a fabulous fast rosd machine - my R400 was stiffer than ideal for road use but wasn't on std springs or dampers
