Agree wit ya Grigg, the first thing that jumped right out at me when I heard talk of a bigger cylinder was that three inch channel at the top. Won't take much more in that wide of a span than what you already have on it. Of course you could always bring gussets down in the corners but it would be just as easy to go to a four inch channel and have done with it.
Denny Graham
Sandwhich, IL
