I have 8 huge elms that sit in my yard. I've moved into my house in 3 months ago and about 4 cleanings of full gutters and the basement getting some water after this last rain storm. Gutters where over flowing. I went ahead and installed one 3 x 4 downspout to see if the larger opening will help the flow of water and see if the gutters get less clogged. I've never seen a good review on any leaf guard system. Have anyone noticed a difference switch switching? Thanks