queens:

Sorry I'm not familiar with repibark. I assume it's a fairly fine bark but hopefully not too fine. I am a believer in good drainage and not overwatering. When I water my plants I expect water to run out the bottom in a matter of seconds, no more than 10-15.

You'll just have to experiment with what you have on hand.

Al on the container forum is very knowledgeable on potting media. My main concerns is that he makes it sound too difficult and his methods are expensive and intensive. A full repotting every year is both in spades. Also he seems enamoured with maximizing vitality, usually called vigor here. Maximum vitality is not ideal on some fruits if you like sweetness and flavor. I've found this true for plum, pluot, nectarine, and citrus. But I'm not sure yet about most other fruits. I'm not really into shorting water or vigor on the berries, may not work there.

We all learn by experience so good luck!!