Yeah man! Mycorrhizal fungi are part of all soil, and there are lots in worm castings. If there wasn't, my method wouldn't work, since plants can't grow without them! As for the 200% organic challenge, I have no problem with people pre-loading their soil with extra fungi. I don't personally have access to any super concentrated organic source at the moment, but who knows, I'll keep my eyes open for some.
What is meant by 'salt grower'?