Standard tuning right now.
I know DADGAD and that's about it in alternate tunings. Not familiar with up a minor third.
The luthier who built mine called it a "terz" guitar designed to be tuned up a minor third from standard. E,A,D,G,B,e becomes G,C,F,A#,D,g (I think I transposed it right - up three 1/2 steps or one could capo standard guitar at 3rd fret)
Apparently this compensates for the lower string tension based on the shorter scale. Hence, when I tune down to standard I get a bit of buzz or dead notes which we think the heavier strings would fix. Currently, there are extra lights on it so he gave me some lights and meduims to try out.
Right now have it tuned to standard. I went to see his acoustic trio play yesterday and he pulled out the little guitar and began playing with the higher tuning it really sounded sweet next to the regular acoustic and the bass guitars. He also has one tuned in Nashville tuning (the upper octave of a 12-string first four strings) which sounded fantastic!
I am going to restring with the heavier strings to see how it goes but I may just leave it a experiment with it in the higer tuning as it sounds great. However, I guess I'll have to learn chords in that position at some point.
Glad you are having fun with yours, I just love mine. When we walked in the store and I saw it my husband went "uh-oh" and the rest is history.