The plants have really taken off since last week.
As suspected one or more has very slight nutrient burn on the lower leaves, I suspect this being due to the soil being full of mobile nutrients such as nitrogen. My plan of not adding nutrients until after this week seems to have been the right move.
One plant seems to be the runt of the litter and has a severe lean, I am going to let it develop strong roots and see how it goes.
My blumat dropper system arrived. And I will be installing it this week, stay tuned.
Next week the LST will begin.