I will also cut some scrap to put under the legs. I also dont like the part about how they do not bolt to the bottom, but I think I might just drill my own holes. I bought a few extra incase i screw that up
I think I will look for a jack-post to use for the center. I was able the climb the structure without it really sagging but those tanks weigh alot more than I do. hopefully I can find one thats pretty thin and streamlined looking.