I really like this. Even though i am a day late and a dollar short, i would do this y axis frame.
What i ended up doing was the original prusa i3 y axis rework from the reprap site and thingiverse
Anet A8 Y Axis Rework by viktor3d - Thingiverse
So far it has done wonders for all the layer shifting.
My current anet build is 3d printing the AM8 extrusions. The frame is done and so far its really stable