It really plays!
I suggest lightly sanding where the pieces the connect. The goal is not to change the size, but just smooth the ridges between layers so the parts fit together better. A little bit a vaseline on the connecting tongues will also help insure against air leakage.
In some ways it's harder to play than the ubiquitous Yamaha we've all seen in schools, but in others I like it better... especially on the low range this is easier, and it's less prone to "squeaking".
I used 1.6mm walls and a 3-row brim for bed adhesion. My printer also has some extra aftermarket z-bracing, which could really make a difference on this print, where tolerances near the top of the print area are important and you have skinnier pieces come up fairly high.