Hey all: This is the tips and tricks forum, so here is one. Camco came out with gutter extensions a few months ago that clip on the standard gutter that all manufactures use. They extend the water runoff by about 2.5 inches. This really helps with black streaks. Yesterday my salesman came in and told me they have come out with a replacement gutter that sticks out as far as the extension. Now it is one piece and not likely to come off while traveling. I am sure your local dealers will be able to get them, but they may not know about it. I have the full gutters on order. I have the clip ons in stock. Both styles come 4 to a pack. You can contact me directly, if you want, and I will help you.