On Jul 4, 8:42 pm, Mike Barnes wrote:
http://www.jubileeclips.co.uk/pdfs/L...uperclamps.pdf

(you could DIY a slightly neater looking version I'm sure)

or these if the crimp marks could be concealed:

http://www.jubileeclips.co.uk/pdfs/L...0O%20Clips.pdf

In any event clips would be good for quick non-destructive testing of
the dynamic properties of various ball materials.

I think I could make some neat clips out of strips of sheetmetal and
roll the join together.

Nobody had mentioned duct tape. I have some clear duct tape!
I have now bought the billiard balls (new) for almost nothing.