overflow flow

[outtafocus]

Thanks for the link. Was a big help in determining my approx Gph.
The Scwd is switching in the 7-9 second area, which according to the chart is in the 400gph range. (my timing method may also be flawed)
This is actually more than I felt I was getting. If you put your hand near one of the outlets, the water flow past your hand seems very weak, when compared to my Seio 620 which is rated at 620gph.

I believe the mag9.5 will work perfect.