I am stumped w these 3" uniseals. How on earth did you get your system assembled using these? I have beveled the edges of my pipes used dish soap and was able to get a few of these together but assembling the system w 5 buckets in a row is impossible for me. got any secrets on how to get 5 buckets in a row together using these? My 5 gal buckets keep bending because the holes are so big.