4. As above - just take your time. Simply moving the scaffold board forward and working from it, will be enough to settle the turf in. There is no need to beat the daylights out of it. This only loosens it as it bounces up and down!. A good watering, after the turf has been laid, will be all that is required to settle the turf into close contact with the soil underneath. As you walk the boards, you will 'feel' or sense if there are any hollows underneath. Don't be too eager to finish and ignore these last minute adjustments. Have a bucket or so of fine soil - or soil and sand mix to do the fine adjustments to hollows as you proceed.

Lawn Prep for Turf
Once the turf has been laid, treat it with a bit of respect. A good watering after laying, will help the turf settle down and start the rooting through process. If you carefully lift a corner of one of the turf after 4 or 5 days, you will probably see first signs of new roots growing from the turf. This will depend a little on the weather conditions and temperature. (If you lay your turf in winter, it probably won't start rooting until its bed warms up in early spring.
You can walk upon it right away; but please, no football or the like for a few weeks. (Even if you do feel that the England team might call upon your services!)
Make sure that you cut the grass as soon as it is long enough - even after a week if necessary. Make sure that the mower is sharp, and lift the blades to their topmost height for the first two cuts.
If the new turf separates and forms cracks in hot weather, brush a little soil or sand into the cracks and keep watered. If you find that the lawn has 'settled' into a few small dips, lift the turf off the area that has sunk, and bring the soil back up to level with a little bit more soil.