The play that I and others have in the rack seems to be only in the LH side (on RH drive cars) and is apparent when you pull vertically on the steering arm. I think the play is in the internal rack support bush. Adjusting the pinion engagement won't make a lot of difference to this, I would say but I have no experience of rack and pinion adjustments and could be wrong?
That sounds much more plausible, and if is the case then adjusting the rack won't make any difference. I have recently had my rack partially apart and there is only one support bush which is on the LH end of the rack housing on RH drive cars, the RH end is supported by the pinion and the rack adjuster screw.
