Super Thrive is a wonderfull product, just don't over do it, not to much not to often ..
I use a few drop`s when repotting and maybe once in between, mostly early on it the plant live ..
your Veg nuts (5-1-1) look ok, but are you providing any Ca/Mg ? and how is your PH of the water you give em ?
beside N-P-K weed and many plants need a good amount of Calcium and Magnesium (Ca/Mg) in order to take up the nutrients (at this point mostly Nitrogen and the reason why your leaf`s are a bit light green)
I use Ca/MG + or just a Ts. of Epsom salt (Magnesium sulfate/English Salt) in Veg ... in flowering I use Black strap Molasses and that got plenty of Mg ..
beside N_P_K and Ca/Mg it will also need a lot of different trace elements, Etc. Copper/Bor/Zink/Iron aso.
do some more research:
http://www.420magazine.com/forums/h...ro-micro-nutrients-what-each-responsible.html
about LSTing
I like it, more then Topping or FIM as it stress the plant and extent the grow/Veg time by a week "roughly" LST don't really, hole point is to tricker the plants grow hormones to shift from the main grow tip and down to the lower grow so you end up with multiply smaller tops instead of one big main cola and a lower and more bushy plant to fit your indoor environment (mostly Bc. of light penetration or lack of it)