The kegs that I have are pin-locks that have been converted to ball-lock fittings. Two of the kegs have the pressure relief valves that don't have a manual release and I want to replace them with lids that do have a manual release. I've seen lids for sale either just as corny keg lids or ball-lock keg lids, but no mention of pin-lock lids. I want to make sure I get the correct lids when I buy replacements. Are the pin-lock and ball-lock lids the same dimensions?