Yep, no big deal to drill them out and replace. Back when I did my HS spar, I had a double row of about 35 rivets "club" over when I squeezed them...didn't know it at the time and figured it out at the end of the session. Drilled 'em all out, and started over!
Sorry the pic is so tiny, but back in 2005, I hadn't figured out the way to size them properly for the internet...
Astronics AES, Vertical Power
RV-7, 5 yr build, flew it 68 hours, sold it, miss it.