interesting. I havent sold any QD's just shut off valves and fire hose sprayers...
edit... seeing those pics you posted just now I havent seen that happen at all actually in the 12 or more I've sold. I will check with some of my dads hoses at the office and see if thats happened. Id almost think those would be treated in some way or another on the inside threads.
You can borrow the flex, just buy my gen 3 pads and Ill give you some SSR, SHR, and FMP to practice with. Im sure retro will let you practice it on his mustang.