Drilling Tank: Small chunks

[spedly]

I'm drilling an aquarium this morning to upgrade my 55g to a 150g. When I was drilling one of the holes for the overflow some small chunks came out when the drill exited the other side. They're not that bad - maybe 1/8th of the way deep - and the glass is 1/2" thick. Assuming I use plumbers lube with the rubber basket, you think I'll be OK? Probably only one way to find out, hey?