That D chord up the neck sounds even better in a drop-D tuning, but the G at the lower end is a little hinkey to get into. You have to play the 1&2S at 3F, 3S open, 4S 4F, 5&6S 5F. It's very similar to a 6-string C chord, only you fret the 1S at the 3F.

Great thundering bass, tho'.

david