I did a show a few months ago and the bassist for the opening act has the same RS212x2 setup, so I asked him to bring one of his and we ran 3 212's!!! That was a wall of sound. If I had any reason I'd add a 3rd 212.I've got an RS 210 and 212 and If I picked up another cab, it'd be another 212 for sure.
1st on this thread, could be 2nd on TB. There are couple in the tc electronic website forum but there is nobody there to answer.