C m(maj9) — C6 Pedal Steel
C m(maj9) has no bar or slant position on the C6 Pedal Steel with the pedals up.
C m(maj9) stacks C – D – Eb – G – B, and with every pedal up and every lever at rest no bar position on the C6 Pedal Steel sounds that set: at every fret, and on every short slant, a tone it needs is missing or too few strings carry it.
A pedal steel does not stop there. With Pedal 6 + Pedal 7 engaged, a straight bar at the nut spells it — 2 changes is the fewest it takes, and the copedent page lists every position, 6 in all.