Looks great so far.:thumbsup:

I think that leaf problem is from heat stress. I have had that happen when leaves have touched the florescent bulb, (they do get warm near the ends) no worry though, They looked to recover well from it.

Yes you can clone after going to flower it just takes a little longer, also do not be alarmed if you get some really funky looking leaves after the clones root and start growing. After a couple of weeks they begin to look normal again, It is from the stress of going from flowering cycle back to veg.

JG