I am new to the seamless gutter business and struggle with how to wrap a bay window. Specifically I have an issue with the backs of the gutter. As a one-man show, on a small bay section I assemble as many sections on the ground as I can carry to the roof, riveting the backs. On a large bay section, I am not able to carry a large awkward piece up to the roof, so I have to join the backs of the separate sections with screws while it is resting in the Guttermates on the fascia. I don't like this. Any suggestions?