i'm not into auto's but man that shit looks awesome dude.
Nice trays! We do styro cups (recycled), then cull/transplant/sequester. Looks like a good project. Keep up the work.
We do 4oz. styro, 3 per each, labeled (recyclable as well). Easy to cull, transplant in nursery trays.
As you know, 4-5th generation of bx to the original hybrid- selective breeding.
Each backcross provides an opportunity to affect the genetic development of the stabilized hybrid. Instead of choosing the best female of our hybrids, our best male is chosen. Choosing best male (our theory and research/experience of a few decades) is selected for potency and quality of high, ripening time, odor, shape, vigor, et. al for our strains.
Your plan certainly doable...keep on, keeping on! Each plant has subtle nuances- at times, hard to "select". Looks great!
We take the long generational approach with selective traits....hence our method of breeding.
Everyone has their own methods. Ours works....and have those that appreciate time/efforts.
Your project will reap you goodness as well.