I really liked the grobuckets and decided to make my own to fit square 5 gallon cat litter buckets in Tinkercad, it fits in regular round 5 gallon buckets as well. The first file is a complete kit with all four parts but it definitely works better to print individually. I also enabled support at 65% overhang, I was originally going to take them out but it seems to work better with them in, which makes the holes smaller. Once printed, the tabs should line everything up on the reservoir and I just added a few drops of hot glue to hold them together, superglue will work too.