I fish Trout and also allot of HOPPER/DROPPER set ups. I noticed allot of fish hitting the indicator, while still having the big ones hanging on the bottom.
So, I took one of Rowley's round slip indicators, and glued and attached a Foam Hopper to the ball. So the silhouette is still a hopper and it is an indicator in which I can still target fish below 10'
Only got to try it once, but it worked!