Hello Tommy, that sounds like a very ingenious, straightforward, simple, and accurate way to deal with such a challenge. Thanks for sharing. Best regards, Allan
I used 3" PVC pipe to mock up parts for cockpit drains on My boat, then duplicated them in 3" stainless pipe. They met at some angle that roughly looked like 45 degrees, but wasn't. It was a shoemaker job, cut some and see how it fits, but better than trying to do it in metal.
Using PVC that fits over the pipe so You can trace around it is a neet idea.