Oh yeah I have.... and, I've discovered with the feminized Autos your better off starting them in their permanent home... UP potting is no big deal.. when I began my auto journey I tested all the.. you can't do this or that to an auto... I wanted to find out for myself. It said, no transplanting... we'll see.
I started with regular autos, so to get 6 I had to start 15. and that dictated I use smaller pots so I did..
1gal pots, up potted after they showed sex around 3wks. after up potting they went bonkers loving it..
so, I started my own way of doing things and mostly grew regular autos....
then I experimented with a fem auto and put it straight into a 2gal felt pot.... she got big too...
Autos that grow super fast and at 3wks old are already 24" I top, I've FIM cut them too, but not often.. I supercrop everything... pinching stems and bending them...