Quote:
Originally Posted by Cynette
Our balls were substantially stiffer than the factory manufactured ones, but were still usable by most teams for testing and practice. One suggestion to make them more flexible is to use tape to connect the ends rather than the rivets.
|
I wish I had known about this back when we wrote the white paper, but the material inside a real Orbit Ball is polypropylene. McMaster sells
4'x8' sheets of 1/16" thick polypropylene for $29.16 and
3/32" thick sheets for $41.20.