David,
Can't answer about immediate past, but Dag has done two items for me, one of them held for a significant time -- I had the same experience you are reporting. In fact, sometimes, when I did get him, he was unclear about who I was and where my camera was.
Despite that, camera came back in buttery shape. We get threads like this every once in a while -- same theme: excellent work, slow to no communications.
Good luck.
Giorgio
PS Have you shot much w. the 28mm 3.5 you bought from BuzzardKid, nee CLE-RF?