After a few tries with a prybar, I've decided this is going to be just one piece of wood and I'll trim the thick end back. Now considering what to plant on it. I'll add some narrow leaf Java fern around the base, but the limbs themselves will need something on them. Looking through unusual mosses, but at $10+ for a 2" square I don't see how I would get anywhere without spending $500 or waiting for a couple of years. I want this tank to be Java moss free but fissidens, Cameroon, Taiwan or so forth might look nice. I don't want anything that will grow too long or thick since the wood is going to leave little open space already.
Nothing good happens fast in an ecosystem.