I couldn't find anywhere else to report this so I am doing it here.

I downloaded the NW sectionals twice and both times Winzip failed to unzip the file (checksum error after reading the entire file).

I had the same problem with 2 files in the Pilots Guide but I don't know which files.

Since I live in the NE the loss of the NW sectionals is not a big deal for me but someone might care. I don't know which files in the Pilots guide were lost but there are so many of them the odds favor me not being affected.