Nice. - I am not so fast. I will mod the stock reflector and have ordered a Frean 13.5 reflector, the 4 XR-E R2 star with the Cute 4 optic and a Ledil Iris (still waiting for answer).
So I will do some research first. But no problem, water here is now at 2-3 degree C
Since my W300 will be a handlight, I have tho think about the heatsink and the driver placement. Maybe I have to bore out the head too.