The stock petcock valve on my 03 America tank works fine. I recently had a second tank custom painted I decided to put a chrome Pingel valve on it and yes I did have to enlarge the hole slightly. Instead of using a file which would produce fine metal filings, I used a "unibit" on a cordless drill, did the job effortlessly and any shavings it would produce would be of a larger size and not slip past the screen on the valve. I installed the valve as per instructions using the gasket and sealer provided and not a drop of gas has leaked . Make sure to use teflon tape on the actual valve threads before screwing it to the adapter plate .
