There is an area of short rape quite close to my house so it is easy to watch for birds flighting in,
this crop never took well on the headland so quite a long strip is very behind compared to the rest.
I was also trying out a modified flapper, most come with a 300 rpm motor, I have swapped them out with 400 rpm ones. Quite a lot of the birds headed straight for the very fast set of wings.
One draw back is the plastic crank pin takes a beating, so 15 mins on the mill cured that!
My Spaniel saw some action in the 2 hours we stayed...