Apparently a pdf attachment that I made to a post did not make it over when the new board layout was introduced. Any chance of recovering that?

It was a dyno sheet earlier this month in the dyno sheet thread under forced induction.

Unfortunately, attachments are lost. I searched high and low about how to recover them after the move, and couldn't find them on the old servers at all. I'll see if there's any other way recover, but it's looking doubtful.