Sometimes it takes me a while to get it. Thick headed I guess. I had been taught to mend my line up stream during a drift. I guess I ignored that important technique till today. I finally noticed while watching my indicator after an upstream cast, even with 4 bb's, it seemed to travel with the surface current. There was no bow in the line,so I thought I was drag free. I finally realized that just having the line down stream of the indicator, I was imposing drag. I then flipped a roll cast up above the indicator and was promptly amazed at how the indicator slowed down and was just chugging along at bottom speed. I know for most guys on this site, this is not even something you have to give much thought to, but for me it was a REVELATION !!