I bought some Purple Wreck seeds a while back, and I gave 1 to a friend that grew it out. I guess he had the trainwreck pheno because it didn't turn purple at all. I didn't really care for the smoke at all. It wasn't very potent and that taste was nothing special. Although I imagine that it could have been grown better. Regardless that Urkel pheno looks freaking awesome! Great job!
Forgot to mention:
MH 600W in veg
HPS 600W
7 gal airpots (maybe too big for me, just don't have 7 feet of growing room; maybe 5 gal next time)
carbon scrubbed with CANFAN (i.e. freakin perfect) exhausted up and out
Max Temp 74
Max Humidity 50%
Min Temp 64
Min Humidity 35%
I have a day by day time lapse photo journal that is so awesome to watch can't wait to see it complete.
I am using Camera+ to take photos with my blue lens glasses for HPS light viewing pleasure.
5 gallon pots can make pretty huge plants too... maybe try 1 gallon or 3 gallon
your leaves look more like heat stress than anything in combination of other things