My tip after building one is go to your local farm supply that sells bins and buy 4 bin anchors and anchor the legs if you haven’t. My was very similar until a really good wind pushed er over..... I never thought it could happen.
Of course, that did push me to double the floor space to 8x8 and add a permanent propane heater. Also, I cut “tank view slots” in my window covers big enough to bino out of and I never open until I shoot. Carpet also helps. The plywood floors make an amazing amount of noise outside when you scrap across them. Which you will do.
In the end though, so far a 168 1/8 buck and a 174 1/2 have come out of it. Very worth it.