Hi guys, looking for a quick reality check here.
Tentative plans of setting up my own light.
Planned parts include cree xr-e http://www.dealextreme.com/details.dx/sku.2394
Driver board http://www.dealextreme.com/details.dx/sku.15880
3x rechargable batteries, series @ 1.2v= 3.6v Not sure if I'd use AA size or C size or what, but something readily available either way.

I need a suggestion on the reflector etc, and some idea of how much cooling/heatsinking is required. I have access to a machine shop, so making the housing out of aluminum is not a problem, and adding heatsink fins to the housing wouldn't be a big deal either.

Anyone see problems or have a better suggestion?