Haven't seen Matt's thread in a little while.
More slow progress:
Using the plugs from the holes to pour epoxy was a
good idea. I got a perfect-sized hole. Using painters tape was a
bad idea in this case. When using the painter's tape to mask off the panels I was pouring earlier, the sticky side of the tape was facing the epoxy and it peeled off easily. When I taped up the plugs, the plain side of the tape was facing the epoxy, and it STUCK GOOD to the epoxy.

All was not lost though, I hammered the plugs out and the tank is fine, but there is tape embedded in the epoxy in the holes, so I'll have to sand it out.
Also, I started pouring the fillets in the corners of the tank:
Each fillet is around 3/4", and I'm pouring them in one layer. This is very easy, takes only a few ounces of epoxy, and should be just as strong as using wood 45's in the corners.
I was originally planning on building little jigs to hold the stand at 45 degrees to pour the corners, but I remembered the 90 degree clamping jigs I made to assemble the tank, so I used those to prop the tank up:
I can clamp them to the workbench and reposition them to hold the tank solidly at 45 degrees for each fillet. It's quick and easy and holds the thing very securely (the post in the middle was just to help keep the tank even while I clamped the jigs down, I removed it later - it's not bearing weight).
Here's a finished fillet:
That's along the bottom of the front viewing panel. You can kinda see how thick the epoxy is around that opening, too.
Also, I started thinking/planning in more detail about actually putting this thing in the house. On Saturday, I mocked up the tank and the wall that will enclose it:
My wife would kill me for posting a "messy" photo of our house, but you get the idea. The chairs and toys to the left are sitting in what will become the short hallway along the "end" of the tank. The narrow strips of duct tape on the sheet itself show the position of the front viewing panel, and the bench shows the position of a built-in bench that will be under the front viewing panel, serving three purposes: allowing me to get in the tank for maintenance (by standing on it), allowing the kids to see in to the tank (again, standing on it), and acting as toy storage for the kids (the top will be hinged). Finally, the bins of toys near the end of the sheet show the width of the tank. Unfortunately, it's hard to stand back far enough to get a good perspective on how the finished product will look, but mocking it up like this for a weekend let us get a sense of how it will alter traffic flow and regular household activities.
For reference, here's a 5' 125 I had in the same position:
I can "age" that picture by noticing all the differences between it and the mock-up shot above. :lol: