Yeah, the problem with mine was it was in 'inny'. A correctly sized set screw. Took no time at all to round that allen hole. No matter really what you have, you can drill it out with about a 3/16 drill bit and the appropriate easy out. Sadly, I can see it happening OVER the fender faster than under. Back pain is a REAL consideration.
I have NO idea why a $3.50 cent water spicket wasn't put in by the engine shop in the first place. My engine shop owner tells me they never put a spicket in. Just a set screw with lots of Loctite. His response to why in the &%^&* don't you use a spicket is, not everyone wants it, so they make it easy for everybody! LOL! As a hobbyist, not knowing stuff, my reaction is, why would ANYONE not want to be able to drain their engine block? Oh well. We didn't need our backs for anything right?