Unless I somehow missed it, the material type is not specified (i do miss things quite often). People talk about trying different things but not what the actual material is. But i like your idea of a heavy duty inner tube.
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Good pointFor me, by the time you buy materials, special tooling to cut maybe and your labor and then compared to what you’ll end up with, I’d probably just get the ones in link above. Cokeman’s were $38.00 4 years ago/plus shipping.
masticated rubber
Ha I wondered if that was your shop. Just ordered some this week. Looking forward to getting them. Should be here on 4/1 or so!I'm still selling these but I'm running everything through an etsy shop to simplify things on my end.
https://bowmancustomrubber.etsy.com