lemon, back off on the nitrogen, that clawing on the skunk is a shit to put right, give em a flush if you didnt already. i got that on mine and also the yellowing on the larger leaves, think it was a salts build up but the flush has sorted it(hate flushing aswell), half the leaves recovered and the clawed sugar leaves are straightening out nicely.
nice plant buy the way its a lovely size, also forgot to tell you i got 128 grms from the skunk i did, think you said 120, good guess!!!
darren ur plants look pukka mate, whats wrong, could not see you were asking any questions, page 161 is years ago isnt it? were on page 463.