Yeah, that’s exactly the mix, I got it off of this thread on ICMag. They even suggest 3-gall9n pots in that thread. Yes, I have grown plants to completion in 3-gallon pots with this mix. You can view the results in my Workshop thread.
I personally use a modified Coots mix in no-till, but find this to be a much simpler place for someone building soil for the first time.