I have also changed the design a little. I did away with the hole in the side of the 8" pipe and changed the outer pipe from 12" to 15". This will have a bigger gap between the 8-6 reducer and the inner wall of the outer pipe to better match the area of the 8" pipe. The will allow me to put more SS hold off bolts around the bottom (probably every 1.5") which will create a screen or grate effect to help keep fish from getting between the two pipes.
