Thank guys for the constructive input.
I am not totally done with the fans just yet. Martin & I were checking them before he left for Ireland for Xmas & we both think there will be enough air flow to go around but I have been thinking of adding a 3rd fan & adding in some pieces to direct the air flow into all fins.
I haven't picked up the AlumiFix yet but need to this week so I can work on them over the holidays. Also have to build the frame to support the heat sink.
I will be putting optics on all the whites ( 45 degree ) & blue ( 60 degree ) but not on the Reds or Greens. My heat sinks well be between 10" - 12" above water level & I doubt it very highly that they will be ever at 100%.
Martin also supplies the Arctic Siler to attach the LEDs to the heat sink so that's covered too.