Hey AnthoT, did you ever order the optic? If you have a barrel I have a 9mm stock diode still in the packaging and all...just PM me if u are interested. I would love to see what this badboy does with a single element!
Still, 2.5W is a lot of power. Personally I don't see the point in going up in power to 3W - 3.5W vs the 2W lasers I have now. For balls to the wall, MOAR POWAH the multidiode builds will be king anyway.