Lol! I've never tried one without, although both my mates RST's have xr2i gearboxes in them and they seem fine!

I never knew much about LSD's but recently a mate of mine who works for Titan Motorsports has just designed an LSD for the new astra VXR's. Them LSD's are clever little buggers aint they, they work by slowly taking power away from a shaft by the use of beveled gears spring mounted over a central axis and gyroscopics in effect. He showed me an exploded view of one and they are neet as F!

Lee