I ran a Kyosho ZX-5 (non SP version) for a season and loved it. Great car it was but I got over excited and ordered the B44 as soon as it was available. At first I was quite dissapointed in the B44 and thought that I had made a mistake because the B44 was totally different to the car I enjoyed driving and as a last ditched attempt I got myself a front one way diff for it. It changed the B44 into a superb race monster! In a different class to the old ZX-5. I've not tried the B44 with the normal diff again but I think driving style has adapted anyways so my vote goes to the B44 all the way.
Never driven the ZX-5 SP so can't comment on that. I am starting to get the idea that Roger might like his
