New owner here, trying to do some basic maintenance and for the life of me I can't figure out the correct size of the hex screw to change the oil. Was it at one time 8mm but now it's so stripped out that I can't find anything metric or standard (that one would get in basic tool kits) to fit? Or was it actually 9mm from the factory ? I have the Fumoto ready to install, I've read the NOOB guide. Thanks for any guidance.

Nevermind, finagled, got it.