2 cents. I would carefully layout the slots both sides of the tube chain drill slightly undersize and hand file to the line with a really good sharp file. The bigger chunks between centers can be nibbled out or careful use of a die grinder or a dremel.
Hello Little Scrapper, I am new to the forum thing. I was wondering how much you overlapped the tubing for the "detail 3" joints in the V-Witt Plans? I am not sure what instruction book the plans are referring to?
I see that you are a plumber by trade. I have a question for you. In the last 3 months, I have had two drain pipes crack right at the edge of where the pipe entered into an 90 deg elbow. The pipe is the 1 1/2 " black pipe. My house was built in 1972.
Do you know of any issues with the pipes or perhaps the adhesive used during that time period?