Thanks a bunch for your input!! And it's good to hear you say that you do slightly amend your coco coir because it's been such a battle in my head. I think wayyy too much.
So I'll probably do 6:1:1 coir, castings, perlite (haven't been able to find rice hills locally). And I'm going to add a cup of kelp and a cup of dr earth home grown 4-6-3 per cubic foot, And some azomite, About half cup. And I'm using Roots Coco Palms. Does this sound good?
The main reason I'm wAnting to amend the coir is so that I won't need to feed until pistils appear. I am running a perpetual SOG with 12 plants so I only veg about two weeks and it's a 10 week strain. I've burnt this strain real easy before so I don't want to fry my roots feeding them too soon, as all the plants will be getting the same concentration of nutrients no matter the age. Dunno if this makes sense, sorry I'm pretty stoned. Haha.