I never claimed to be the first, and don't give a shit who was the first, just thought it was info others may have found usefull, so took the time out to let them know.
I don't know the exact size as do not have one in front of me to measure(yet), but of course you would need to remove the paint to get a accurate diametre.
Comments like this are why I am thinking of ditching PF.
tabetha