I'll give it a try as soon as my machine is free again. I have the "traffic" workbook open all the time so we can all see the status of new orders, which I am starting to suspect...

The process has slowed to such a crawl that it takes about 5 minutes to run now, even after shutting down the spreadsheet and reopening.

It's almost like a cache is filling up, since it seems to take longer each time I run it.

Thanks for the help and like said, I'll give those changes a try when Excel wakes up