I saw that with experimenting in shop, mine one inch was tight fit in hardy hole.
I made three od them I have some stock to forge other from that 1 inch square one bar , I will see maybe to stick weld or unwrap more call.
Right now Iam out off fuel and quite sick like flue or cold, and I need some time from shop , it became like opsession.
Have so much tools to make but so less time for it.