My dynavector cartridges are all have higher compliance than most of the MC cartridges on the market. I have no idea bout WT tonearm effective mass but this is the reason Dyna was recommended to match well with this arm.
Regarding Grace i would like to recommend 80's Grace LEVEL II Ruby, this model is much better than older F9 from the 70's.
I want to admit that LineContact Ruby is modern SoundSmith version, not the original Grace.
This is original Grace Ruby for LEVEL II and it's an excellent stylus, but later LEVEL II styli with Beryllium cantilevers are so much better (unfortunately very rare).
Regarding Grace i would like to recommend 80's Grace LEVEL II Ruby, this model is much better than older F9 from the 70's.
I want to admit that LineContact Ruby is modern SoundSmith version, not the original Grace.
This is original Grace Ruby for LEVEL II and it's an excellent stylus, but later LEVEL II styli with Beryllium cantilevers are so much better (unfortunately very rare).