Casper got me hooked on the clay method. It's easier to do for me and seems to be good for the microfauna. I have a ton of springs after only one flood that seem to be living in the clay. You can always add things to change the color. I use iron oxide to darken it up I've seen people add something to make it redish. I thought that looked awesome. And of course it's clay you can always just mash some abg in it as a top coat. As for the hybrid I've pushed wood in but nothing to advanced. I hope to try a concrete peet moss tree stump on a clay back soon.