[Federico]

Thanks everybody,
I've done the job using 4 pairs:
1) Oktava 012 w/hypercardioid capsules 90° in the imaginary circle focus:
nice sound, good stereo spread but the sound is too dry.
2) AKG C414ULS in M/S (M omni) 3 feet before the focus and 5 feet high.
Wonderful sound!
3) RODE NT2000 omni 3 feet before the focus, 5 feet high and 6 feet apart in
A/B. I miss the center a bit but I can always add the "M" C414
4) Crown PCC160 taped to a Jecklin Disk right under the M/S pair. Really
nice but too much high frequencies. Really a lot!

I will mix the tracks in the next weeks and I'll let you know who's the
winner. I'll try to post some audio too.

Thanks again
F.