I play about half the time--at least--in "double C" tuning, like the G modal (2nd string tuned up to C), but with the 4th string tuned down two steps to C, an octave below the 2nd string. And I use railroad spikes: one at the 2nd fret for capoing from G to A and C to D, and one at the fifth, for capoing from open G to open C. I have installed them myself before, but now I leave that up to my banjo luthier who does a better job for only a few bucks.

--seed