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Cut a bicycle tube about 4 cm long. Roll it on itself. You will get some sort of rubber donut ring. You can slip it on one of the two poles to stop them banging against each other's.

Yep I will :-)

Hi Phill,
This is the website of the original designer:
https://4stablestick.com/about-us/?lang=en

The Rudolph one is a good copy with a few improvements like the foam padding on the legs that...

Four stable sticks, or their imported copies (Rudolph in Cambridge).
https://www.rudolphoptics.co.nz/products/rudolph-ph-shooting-sticks

The best 170$ you ll ever spend.
To practice, get a 22...