So I finally started building. Super preliminary photos:

I'm gonna need A LOT more great stuff lol. So glad I did this outside.



here's right after I sprayed the Great Stuff: (also used half the can in the other tank) Can't get any more pics to update yet.




It was sooo messy and did not puff up as much as I think the yellow kind would have, I think I'll do another can of yellow followed by the black stuff. I still want to go up the left side a little and in my other tank I barely covered the "shelf" I put in: