Thanks Fletcher, That's the ideal way but I can't try the CS4 if I don't purchase it. So I think share your experience is good for all us.
In my LDC's collection are U67, U87, M990 and C700s. I think that the CS4 might complement the others, as it could be other m7 mic (Urton, Geffel...). My hesitate is after waiting 7 months for the Lucas, it come in a difficult moment financially speaking. I can pass by and to get other mic in a future or to do the effort and purchase the CS4 now. So, in this situation what would you do? The CS4 worth the effort now?