I've sort of figured out that the distance between the knots toward the bottom dictate how large a diameter container you can use. If they are too close, they don't spread out enough and limit the size of diameter that will fit. That has to correspond to the top for hanging and I'm not very good at estimating that. No two are alike when I do them! They have been faster than drilling holes through clay and ceramic and for the most part don't look too funky
.
