To Build A Better Bongo

I’m working a great ProjectSam sample into a jazz template, and need to build a custom instrument. And I’m pretty clueless at this. The quest:

I don’t know how to get the lower set of notes to register on the bottom line of the new bongo part. Helpful instruction, kind people?

Select the second and fourth beams, and press Alt/Opt-Down Arrow in Write mode, to move the notes down an instrument and onto the lower staff line (assuming that’s a percussion kit comprising two bongos?)

See also:

I got it. The dance of —
1. build percussion map
2. build percussion kit
3. install
4. tweak
5. mix martinis