How to Set the Black Tank in Bambi II

[Becky B.]

I am ready to set the black tank back into the Bambi II. It's really the first thing I have to do before I can start making walls, etc. I didn't take good pictures of the removal & what was under the tank to shim it in place. I just seem to remember random pieces of plywood. This tank sets on top of the floor & the plumbing hangs out a hole in the floor. Do people use screws to secure the pieces together under the tank? Glue? How have you set your black tanks?