OK so I'm stressing now I'm doing a friend hair tonight and really doubting myself. I'm doing a full head of 150 Nano's but not sure 8f I should leave a maintenance row in between each row I was told to on training but have since been told different. She only has short 12 inch hair so going for 18 but I'm so doubting myself. I'm sure it will be fine but someone I know has really made me feel doubtful I'm doing them wrong im sure I go up the head so there's enough hair to cover the Nano's around the edges parting and low enough for the natural crown to cover them Please someone tell me I'm right I'm so stressed now my usual method is wrong??