"Thanks for the hard work, I know you guys burnt many midnight hours."
"You guys are terrific. The quality of drawings you deliver is awesome."
"We received some great news yesterday. The AORs are extremely impressed with the drawings, and they told us that these drawings are the best that they have seen come out of our office. We certainly could not have accomplished this without you, and we send you our thanks and congratulations for a job well done."
"Thank you for all your hard work on this project."