The dials are too small. I was giving this add on a try, but the dials can't be adjusted over a rather small size.
Other add ons I have used allow you to choose the number of rows & columns in the grid, and you could choose where the dial goes (leaving empty spaces if desired).
This one only allows columns and the dials automatically fill in from the left.
Сервис поддержки клиентов работает на платформе UserEcho