Cool. I bought a couple reconditioned ball-lock Cornys once and didn't love the way each lid felt when it closed , so I swapped lids and got a much better fit (and seal) on both. Do you have another keg you could swap to?
I just came into some plastic PRV single handle firestone kegs. Replacing the entire lid instead of the PRV. I'll try one of the new ones on this pesky keg.