Laser Pointer Forums - Discuss Laser Pointers | High Power Lasers

I'm building a 445nm laser using a X-Drive 1.8A 6V, a Osram PLTB450B 1.6W diode, Kryton Groove 5.6mm host so i can't use a module, 3 element lens.

I need help with what kind of heatsink i will need?.

Link-http://laserpointerforums.com/f64/custom-copper-heatsinks-made-order-42626.html#post559975

Copper or Aluminum?