LOL Albert. Hey I'm a loveable guy.
Anyhow I guess I should add I used it in my 65g as well. In both tanks I did exactly as you describe you want to do: I scaped out a structure, solidified it with rods and cement then dropped them in the tank. I love the stuff, it blends into the rock perfectly. Coraline has an affinity for it too so it gets covered quickly.
Anyhow if you want some of my leftover bag, you're welcome to come borrow it. Only thing I ask if you could bring the bag back when you're done because I might do some more aquascaping down the road one day. Two tanks and I've only used maybe 25% of it, a little goes a long way. I live in the deep south. PM me if that works.