Yes, a viable alternative, but one I’m trying to avoid…You might have better luck boring out a piece of 4” shafting.
Ultimately related but just a simple collar in this case.I'm visualizing a "thunder mug" taking shape here....
Thanks but I’m south of Calgary and probably won’t be up your way anytime soon.If you are in the Edmonton area I can supply a length of 4" or 5" OD 4140 steel shaft if that would work for you.
there are a few pieces of suitable stock here in Calgary.
Not desperate at this point but thanks.I just checked my stash and there is a 26" long piece of seamless tube that measures .010" under 3.5" ID and .005" overy 4" OD but it's in Edmonton. If you're desperate I can cut off a piece and mail it to you