James — not sure how I would connect it without tapping and threading the hole the fill probe connects to? The probe is threaded male and in my picture I am using a female FF QC. I know Huma made a few QC probes but does not fit my CL.
jarmstrong — No worries, answer is one less part to keep track of. I fill multiple PCPs from my tank. Also makes it a bit faster as I do not need to rotate the cylinder dust cover; I simply connect the QC fitting after removing the dust cover, fill, and I am done. Reduces wear on the fill probe O-rings as well.