Great thread and allot of ambitious goals, very nice indeed. My passion is sativas, hands down. As someone mentioned before its very hard to find a good strain to use in a breeding program.
With plants that small I would hope no nutes were used and it appears you have a moisture stress problem. Read UB's thread on Moisture Stress and you will see the big picture. Peace!
I grew the RP #18 over a year ago. Didnt like much nutes and produced well under a 1000 watter. To this day its one of the dankest I've had and if youre not careful someone will be tucking you in bed for the night. You will enjoy it for sure!
Just want to validate UB's facts with a few pictures. So you know--- I'm an old fart so this is nothing new to me. You will notice in one of the pics the lowest branch being held up by a 12 oz RedBull can, no lollipop here, just a big bud. These pics were taken just before the harvest and look...