First Solo Rekey on a High-Security Schlage System and I Almost Busted It

So I'm out in the Phoenix area where the slow season doesn't really exist, and I get my first solo call to rekey a whole office building with Schlage Everest cylinders. I'm sweating bullets trying to get the pins right on the 5-lever setup, and at one point I drop the damn key blank into the carpet - spent 20 minutes fishing it out with my pick set. Finally got it pinned correctly after double-checking the shear line three times, but man, my heart was pounding like it was my first day. Customer was thrilled, didn't notice a thing, but I feel like I dodged a bullet. Anyone else have a hilarious botch on their first big solo job?