On Jul 3, 7:27 pm, Peter Watson wrote:

How about making a net of six rings (top, bottoms and four sides)? The
rings could be made out of fishing line and joined together by the same?

Yes, they would end up being roughly squares.
On the other hand I'm coming around to the idea of using epoxy glue to
glue an attachment to the top of the balls so the fishing line can be
attached. Most cradles have a gap betwen the attachments but why can't
both lines be at the very top?