yes maybe pot them on, with some more soil and pebbles in the bottom, for better drainage, for when you start to flush,2 week before you harvest.
to get rid of the old nutes.
good idea about the scrog.
im also growing 4 little ones like that.
1 ak,2 paki valley and 1 indigo.
all looks well.
keep up the good work, maybe add another light.
more light more better bud