master kush is one of my favorites, it responds excellent to topping, lst and scrog. i would asume a mk X would react similarly. my ww's would yeild 14oz on average with my 400hps and my mk was more like 12-13 oz but the quality/potency was better. i always top my plants. imo topping/lst is practically a must with indoor growing, especially with lower wattage grows (400 watts or less) as these lights don't have great penetration. this is how my mk resonded to lots of topping and lst. they were grown to this point under flouros only for about 6weeks from rooting.