[Test-Equipment] Kikusui scopes?

[DaveC]

I stumbled across this brand of scope today. Never heard of them 
before. Some models have 5 channels and up to 12 traces.

First question: how does one get 12 traces from 5 inputs?

Others: How are these scopes to own? Any common failures or problems? 
Service manuals readily available?

Thanks,
Dave