I always feal like Macgiver when I'm done working on a crank with a chainring bolt hidden under the arm.
And while I'm on the subject, why the %$^@ does the Park chain bolt tool have a long protrusion in the middle. I guess the hex head side of the bolts are supposed to be hollow and its a guide? Anyway, mine aren't hollow. So the tool won't fit. Boo hoo. Back to using the old block plane blade to engage the slot in the bolt.