Since this has happened, my shots are running about 10 seconds faster at the same grinder setting.
So... my question for those who have the courage to admit they have done the same thing:
Should I bother to try to fix my dial-in by going finer, or should I and just suck it up and get new burrs (and save the coffee)?
I would be really surprised if the burrs are damaged, just dial it a bit finer and forget about it unless you can't get a good grind anymore.
It may be that by bringing them close together, you have caused them to seat a little differently, thus changing the settings? Without seeing the inside of that make of grinder it's just a guess.
A Chipped burr is another matter entirely. A friend of mine bought his Macap MC4 to my house to "compare" the grind with my Mazzer. I told him I thought the grind was very slightly inconsistent, and there was more of channeling/early blonding. I opened the grinder up and inspected the burrs, only 1 of them had a small chip out of it. He then let on that he knew this as metal had gone into the grinder, but didn't want to tell me, in case it affected my judgment of grind. I personally was really surprised that such a small chip on a single burr could make a difference detectable in the shot!
Your "accident" should not have chipped a burr or even allowed the cutting teeth to contact, so no worries (hopefully).