Anyone have experience with the Serrac?

I'm considering it for a Graflex (Series or Super) D 4x5 SLR - probably the 8" / 203mm - though I haven't seen many photos made with it.

I've read it's a Tessar type, and that it's sharp.

Besides being a little faster and longer, how does it compare (open vs. stopped) to the 190mm f/5.6 Ektar on the 4x5 Super D?

How does it compare to a f/2.9 Pentac?

Would love to see any photos, especially portraits, made with the Serrac.

Thanks,
Bill