I really liked the way the This is Create: Above and Beyond youtube video shows the andesite quarry. I couldn't figure out how the lava was just floating on top of the water without splashing over when it generated a stone. I realized after a little bit of a closer examination that it seemed as if you were using obsidian bits from C&B to keep the lava in place. When I try to duplicate this the lava flows into the adjacent blocks, despite the obsidian bits occupying that space, and then converts the entire block of air/obsidian bits into C&B lava. Hopefully this is just a mistake on my part and I'm doing something wrong.

When I place the lava in the center of the formation it flows into the adjacent blocks like above resulting in this
Where (L) is just a block of Chisels and Bits lava

Upon further testing this seems to be from Chisels and Bits. The liquid has to have a wall beside it that is the height of a regular block, if even 1 bit is missing then the liquid will flow out and cover the adjacent block I'm not sure if this is a feature or a bug

I'm not sure why C&B is doing that, but I'm pretty sure the actual blocks used in the trailer are from CBMicroblock. Using the saw you can make simple shapes.

You'll need a diamond saw to cut obsidian specifically but the iron saw and cobble will suffice if you don't have one.

It's probably not a bug for C&B then, I'll peruse the issues there and close it here :)