I make sure at every appointment that I rotate the sides and hairline as that's where the most fragile hair is, then I will rotate the bottom 3 rows. Next time, 6 weeks down the line I will rotate the sides/hairline again and the remaining 3/4 rows at the back. I will also re-apply any lost strands and repair any the need re-bonding (occasionally the metal will come away from bond). This appointment takes over the need for maintenance and usually takes around an hour-hour and half. I charge between 60-90 pound depending on length of time taken. Remember also that you will need new rings as they can't be re-used x