i've tried lst and topping experiments with the eight blueberrys i've got, and have had excellent results with both of these methods. i would only suggest topping if you are growing a strain that's yeild/cola size are not affected. topping some strains leads to more buds, but much much smaller. lst is awesome for stunting growth and keeping them squat. the one plant that i lst'd only, is 9 inches tall, but cosists of about 25-30 branches; pot looks like a hanging basket.

considering the size of your grow space, i'd say lst; bend em, bend em, then bend em some more. let the plant gro vert for about 3 nodes, then tie the top down again (remove prior strings, or retie one for whole grow).

good luck!

love, brooke