I fitted a britpart 'super gaz' rtc damper beginning of October, when I fitted it it was very hard to compress, and actually when I first drove it I hated it, it pushed the steering to the right and I nearly took it off, after a couple of weeks it seemed to of bedded in and it steers like a dream now, far better than the old crap standard one and a similar price to Armstrong. I have fitted a new steering column, new steering box, and all new ball joints on the front axle, also stripped front axle and replaced all bearings and seals so everything is set up perfectly anyway, don't know how much of a difference the rtc makes on its own, but I like the look of it!!