The original question was not if a mid-low compliance cartridge would "work" on a low mass arm. Of course it will work, but that wasn't the question. The question was and is, will it work OPTIMALLY.
IME, the answer is that is will work somewhat differently than designed, and basic physics tells us why.
Fact: Compared to higher mass arms, a low mass arm offers less inertial resistance to stylus deflections.
Fact: a low compliance cartridge offers higher inertial resistance to stylus deflections.
Pairing the two means that energy from a stylus deflection will produce relatively more movement of the arm and less deflection of the cantilever inside the cartridge, when compared with the same cartridge on a higher mass arm.
This does not necessarily result in mistracking. Like Raul and Breuninger I've played such combinations successfully. However it does necessarily result in reduced peak amplitudes. Reduced cantilever deflection = reduced voltage produced by the generater. Lower compliance cartridges on low mass arms yield reduced macro-dynamics (especially in the bass frequencies) vs. the same cartridge on a higher mass arm.
Whether or how much this matters is a user preference issue. Many people prefer a somewhat mellowed sound and this is one way to achieve it. Many Koetsu users are in this camp, since that's the nature of most Koetsu's anyway, so it's no surprise that some Koetsu owners enjoy their cartridges on lower mass arms. Whether the OP would is up to him.
IME, the answer is that is will work somewhat differently than designed, and basic physics tells us why.
Fact: Compared to higher mass arms, a low mass arm offers less inertial resistance to stylus deflections.
Fact: a low compliance cartridge offers higher inertial resistance to stylus deflections.
Pairing the two means that energy from a stylus deflection will produce relatively more movement of the arm and less deflection of the cantilever inside the cartridge, when compared with the same cartridge on a higher mass arm.
This does not necessarily result in mistracking. Like Raul and Breuninger I've played such combinations successfully. However it does necessarily result in reduced peak amplitudes. Reduced cantilever deflection = reduced voltage produced by the generater. Lower compliance cartridges on low mass arms yield reduced macro-dynamics (especially in the bass frequencies) vs. the same cartridge on a higher mass arm.
Whether or how much this matters is a user preference issue. Many people prefer a somewhat mellowed sound and this is one way to achieve it. Many Koetsu users are in this camp, since that's the nature of most Koetsu's anyway, so it's no surprise that some Koetsu owners enjoy their cartridges on lower mass arms. Whether the OP would is up to him.
