Mike, you understand the issue with tankless recirc perfectly. GPM x DeltaT X 500=BTU. Your tankless will have a minimum flow to initiate operation....
I borrowed a tool a couple years ago and returned it with a gift. As to lending, It depends upon the tool and the borrower. Some tools will never be...
I have gone to Ridge as my primary blade on my SS. A word of caution as a new SS operator. I use my own introduction to the saw as an example. Within...