Well your method and setup is really cool. I'm just starting off with living soil now, working my way to no till, hopefully. I still have a lot to learn and it looks like I'll be learning some from you. I'm not ready to take a dive into coco based yet. It looks like there could be a learning curve, but i'll definitely be following your thread.
The main learning curve with Coco aside from peat is go very very light on the Dolomite if any at all. Peat being so acidic needs Dolomite to keep it in balance, if you treat Coco like peat and add the standard amount of Dolomite you'll jack your pH way up and can't bring it down. Coco has a natural pH that's ideal for cannabis, so to ammend and supply cal/mag you use Gypsum and Epson salts.
But first and foremost always rinse your Coco and test the EC while you do it. Use cal/mag like general hydroponics brand or purchase calcium nitrate and magnesium nitrate or sulfate to buffer the Coco. Sulfate is Epson salt and much cheaper than the other. Both nitrate forms are available online. I buy them from a company called Kelp4less.com.
You would ammendment the substrate with your preferred organic matter just as you would peat, there no difference there. However with Coco you add in organic acids, whereas peat naturally has humic. Again, you can purchase pure humic and fulvic acids from Kelp4less.com these are your chelates, they're extremely important and if you use them you can completely forget about pH ever again.
I can make up some Fermented extract feed water with a pH of 4 and hit my plants with it and not bat an eye.
Don't buy bottled nutes and pay out the ass for 70%water.
Lastly, ALWAYS ADD COMPOST and Leaf Mold to Coco and worm castings too, but not needed. Compost and leaf mold are essentials!!
That's pretty much It. Once you go Coco, you don't go back! That I promise you!!!!
One last thing and this is totally up for debate and completely dependent on personal preference and that's water quality and source. As you know I only use 0ppm, thats the closest I can get to rain water just like in nature. Tap water has chlorine and other shit that will kill off your microbes over time. It's my opinion that if everything your plant need is in the soil, why give it in the water. By doing so you will have an accumulation of things you don't need an accumulation of, like calcium, magnesium, iron, and sodium (if softened)
I would recommend pulling a water quality report from your local municipality. Theyre available on-line.