This pic shows Lynx fittings (male) at the ends of the hoses that are directly attached to the torch.
Here's a pic showing the Lynx fittings with the Quick Connects fittings (male) beside them.
(I'm wondering if that little "bump out" on the shaft of the QC male fitting is what makes the "click" and the attachment to the female part. If so, it stands to reason that the Lynx fitting doesn't work because it's the same diameter all along the shaft, right?)
And here's a pic showing one of the Lynx fittings (male) inserted into one of the Quick Connects female fittings. It fits inside, but it doesn't "click" and attach. The Lynx male fitting is 2mm long and 0.5mm in diameter. The Quick Connects male fitting is 2.5mm long and 0.5 in diameter.
Do the photos help with the diagnosis? Thanks for your help, BTW. I'm anxious to use my new torch and truly appreciate any assistance.