Just did a gutter vacuum on a woodland property. The gutters had 60cm plastic grids placed inside them for the entire run. I agreed with customer to get rid of these for them as they have a ton of debri on top and beneath them. Vacuumed the property and flushed downpipes. The downpipes run from 30ft high inside the wooden exterior of the property and then come out in a kind of underground garage area. If they get blocked up its gonna be a mission to do any maintenence. Customer was asking about what kind of measures could be taken to prevent debri getting into the downpipes. The downpipes are square standard size 65mm - any recommedations for leaf / branch excluders that won't instantly block in the auturmn ? thanks in advance