They are 6 weeks old. Should I lollipopping, yes o...

Plant is not big enough or deep enough to warrant lollipop, lollipop is to get rid of all growth below a point which you now will serve no purpose come harvest, you are expediting that which you know will have no use. Very fact you need ask if you should lollipop is "the" reason why you should not. Above all else plants require leaves to perform gas exchange and produce energy. Every leaf you remove reduces the potential for the conversion of energy. If your plant was 3-4 times the size with a deep dense canopy then you would lollipop. If you want a 15g dry come harvest then lollipop.