Alright, I Need Opinions

Alright so uhhhhh, I don't want to completely spoil the Collaboration but I plan on just adding some of an Original I did and just using that because I can't figure out anything original right now :'). But my question is this: Do you guys want just Piano or multiple instruments? And I also have one more question. Since I won't really be able to add anyone due to being away, I need someone to be a modifier so they can add people that ask to join for me. So uhhhhh, could whoever that's able to do that let me know please? :')