First I wrote an article on thermal forming PVC pipe. Then I wrote one on boring out PVC pipe to make a full slide coupler. As those new discoveries sunk in, I realized the first article had information that would improve the second. In a very obvious move, I used thermal forming to make full slide couplers without the use of any machining. The result is more accurate and faster to make.
If you are interested, please see
Your comments are welcome. All of us are smarter than any one of us.