I don't have a file with a half inch diameter, so I thought I'd try mitering on the lathe. I also don't have a hole saw, so I did it with drill bits. The tubing is secured in the lathe toolpost and I drilled the hole out to half an inch.

I don't have a file with a half inch diameter, so I thought I'd try mitering on the lathe. I also don't have a hole saw, so I did it with drill bits. The tubing is secured in the lathe toolpost and I drilled the hole out to half an inch.