Well I just went ahead and did it last night..
I took the V off my corner overflow on the 90g tank.
I took a bunch of pvc
pieces and extended the overflow pipe out about 1.5ft, with a T near the point of the original V and an elbow at the end.
Changed the main return pump from a mag7 to a mag12 to compensate for the extra head or whatever you call it..
Took two maxijet 1200s out, replaced it with a maxi 600 hidden behind a rock.
So far everything in the tank seems much happier with it this way...
This tank is a two sided tank, so the way the rock was layed out and the previous flow, fish tended to just ride in the current. Now the current isn't as swift in such a circular way, so the fish are all out and swimming and just simply more active.