read the recipe of the medium in the first post, yours is too rich in nutrients
Now, that's the kind of yield I need to get with my autos.I have to disagree with you on topping Autoflowers. I have done it many times.
I also transplant, these were started in 1-gallon pots and transplanted after 2-3 weeks.
These have all been topped after the 4th node
Peace GG