Had a bit of a drive and there is no slippage whatsoever! But the clatter is very noticable (loud at times), especially at idle and also under acceleration. Sounds more like a diesel. You rev it a little at idel and the noise stops and when the revs fall, the noise returns. Also there is a bit of a vibration coming through the steering wheel when it moves around (engage and disengage). Some may think there is something terminal with the car, mechanical fault which is what I thought of at first. Also with the lightness of the flywheel, you need to give it a bit more revs as she will stall if treated like a factory unit.