Thanks for the replies. I've got some impressive results. I did use a middle pot for the roots to form a better ball structure and through lack of medium sized fabric pot's I've come to the opinion that a short spell in a plastic pot seems to be better. Just saying what I appear to have witnessed.
I'm a big proponent of fabric pots, but I will say that I like the rigidity of a plastic or clay pot as fabric can result in compacted medium if you aren't careful handling them.
I’ve tried red cup to final pot and it takes longer to veg. It may only be in the 1gallon for 3-4 weeks but I think it’s necessary for maximum growth and health. I figure I have 90-140 days with each plant before harvest, depending on seed/clone and strain, why cut a corner?