3-in-1 Musical Instruments

I love 3-in-1 sets, their endless possibilities to build and rebuild with the same set of bricks. And I wondered for some time whether it would be possible to create such a set beyond the classic themes like vehicles, houses or animals. This contest was the perfect opportunity to give it a try. Being able to build different musical instruments with a limited number of bricks, it seemed like a perfect set to me.

These are my three musical instruments, built from the same 140 parts. The guitar is the main model, the djembé (African drum) and the trumpet are the B-models. And I wonder... if it were a real set, would there be more alternates from other builders?