use cheap tennis balls from the pound shop etc, they grip the canes well, you just have to be a bit careful punching holes in them. trust me i know

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Kernow rag nevra

The difference between genius and stupidity is that genius has its limits
Albert Einstein

Just be ordinary and nothing special. Eat your food, move your bowels, pass water and when your'e tired go and lie down. The ignorant will laugh at me, but the wise will understand
Bruce Lee