Ok I think I have decided to go through with it. the only thing to decide now is do I do two of them or just one? I just got my power heads today. got them off ebay for ~$13 each. (they are the hydor knockoffs, taking my chances).
packaging was trashed when I got them
but I checked them out and they run great, nice and quiet. They are 800gph each and only pull 6w, dont have a multimeter here so I cant check to make sure though.
They came with suction cup mounts but I am not going to use them, I will use a mount system that I will make.
here is a rough drawing of how the gear box will work.
I will be able to adjust it from 16% 25% and 60% oscillations. the small gear will be attached to a rod that mounts to the powerhead, and the large cam will be attached to a very small motor.
any sugestions on any of this?
I need to re-draw the gears a little but the over all idea is there I think.