Just got to say that I love the 507MKII as well. I use it with an Acutus and XV-1s, I used to have a Te Kaitora Rua, but in my system and after my preferences, the XV-1s was a much better match (other people/systems my like the Te Kaitora Rua better).
I have the standard Dynavector headshell with azimuth (15g) an older Dynavector without azimuth (12-12,5g), Yamamoto Ebony (10,2g) and Yamamoto Tsunge (8,2g), it's well worth the investment, which is small after all, to experiment a bit with headshells since the sound changes a lot. I dont know if the sound differs mostly because of different mass or material.
I have the standard Dynavector headshell with azimuth (15g) an older Dynavector without azimuth (12-12,5g), Yamamoto Ebony (10,2g) and Yamamoto Tsunge (8,2g), it's well worth the investment, which is small after all, to experiment a bit with headshells since the sound changes a lot. I dont know if the sound differs mostly because of different mass or material.