Zyx Universe Break In

Hello:

I recently took delivery of the much praised Zyx Universe cartridge. After installing on my Breuer tone arm, the listening begins. Although I've noticed alot of detail and good lower frequency response, the highs are somewhat sibilant and bright. I'm wondering if this is typical of this cartridge during the break-in period or do I need to adjust VTF or VTA? Additionally, what is the average time or album sides to tame this cartridge? It appears to have lots of potential, just sounding a bit unnatural at this point.