I recently sent a M8 8X Ao and a really old 3-9 AO. They sent them back with new lenses, and turrets. Sitting in the safe as spares right now.

The 3-9 AO come off of a reservation in N/M and is really rough Including scratched lenses. I now looks the same except for the new lenses.

I thought it was great service. Turn around was less than 3 weeks if I remember correctly.