I have been trying to get a "real" slant tank for quite a while. My Cousin, who is very handy. fashioned this one.
I took a few preliminary photos. Just getting the hang of using it. I think it will work out.
After the pic of the entire slant tank (quite small actually) I show the fly before and after going for a ride on the water.
Tried it outside. A bit windy and hard to control the location of the fly on the surface. Will try when there is no breeze and get a pic at different distances.
But, it does provide interesting observations...I think, anyway.