Thanks Mike.
I didnt look too far into the cheaper canvas, because I was afraid it may not be colorfast or waterproof. I suppose if it's cheap enough, I can afford to let it wear out. Perhaps 'weather' may be better word to use. My friend Andy, another MLU member, gave me a nice big dark green tarp that I have been cutting into to make the canvas goods for my gun project. It is nice and pliable, easy to work with (including sew with domestic sewing machine), and it does stretch a little. Guess stretch is a good thing in some instances, not all. The down side is, it freys easily, and is definately NOT colorfast. The freying isn't an issue really. All edges get seamed. The dramatic fading is a concern long-term. Im about to cut a chunk of it out to make a flap that seals the front of a bookshelf I bought to store my tanks. Was going to make a canvas bag to carry all the rechargable battery packs, then I realised it may look like a suicide vest! Good idea, bad time to make it.
You will note there is room for one more tank.
Two more if small.