I have been buidling this soil for a long time now. Bugs have been a little issue but I have managed it very well with all natural products.
Only ever heard of good things from https://www.greenhandorganic.com/ and the experience of growing 3-4 grows with these products has given me much confidence in making more of an investment into a big 75 lite pot.
I have done this using horizon layers too:
viewtopic.php?f=11&t=15318
All GHO, apart from compost and no Coco here.
This was left for one week before even potting up ontop of the horizon layers.
I also innoculated the horizon layers and watered it in before adding compost and the mix in the photo's above.