Man looks ok to me though I think you could have made it a little thicker. If you are putting it into a lake with little to no cover it will work great If the lake has some cover available then you might not enjoy as much success as your wanting. I fish a lake with a ton of old virgin forest stickups still present and coontail moss that grows 20 foot deep. If we use Jerry Blakes style of tall crappie condos, we have to place them in areas that dont have the grass or stickups to notice any effects at all and those condos have 10 to 12, 20 foot tall peices of bushy bamboo.
Bottom line is your moving in the right direction in building cover for the fish to live and you to fish. If this style dosent work then make the next batch bigger till it does work for you.