How about a trammel cutter? With that you could dial it to the exact
diameter you want, they are cheap and you can re-sharpen them.

What is this? A search of eBay and MSC turned up nothing


Also, how did you wind up pulling all of the tubes?

Young man named Ryan. Strong as an ox. He just wiggled and pulled. I
couldn't believe it, they were all two feet deep.

Karl