Adding the chinese Pipa to the list of instruments
It was suggested that I post this here.
The pipa is a popular chinese solo instrument that is tuned A-D-E-A (thickest to thinnest).
I'm unsure of how the notation traditionally is put but as I've read it (only performed with it twice, though) it was in bass clef 8va.
The Atlas Ensembles page on the Pipa is great and I'd recommend givin g it a read before eventually implementing the instrument!