Yesterday I made a buck driver for the FWAA and installed it this morning :
I still haven’t received my gold plated brass buttons so it’s a 10mm2 (D~3.5mm) wire for now, not ideal due to the inevitable oxydation.
I sliced the 219Cs for better tint and throw.
The beam while still very floody is much more usable now, the tint is also much better, I used a lens from kaidomain instead of the original one which increased the duv quite a bit, their AR coated lenses are still purple reflecting, but don’t worsen the tint significantly, less than +0.0005 duv.
Compared with before :
Especially as soon as the FET turns on (lv4) the duv increases a lot, it’s actually very easy to see when ramping up from the 7135 to FET, I didn’t know 219Cs behaved like that, at higher duty cycle the duv comes down.
Thanks to Sunnysunsun for his FWAA’s measurements with which I could design the board before receiving the light.
Ideally I should have made some runtime measurements or at least sustained output to compare with the high efficiency buck driver, but… I was feeling lazy 
(and well, with the LEDs sliced it wouldn’t have worked), I should really do it at some point because while it seems it heats much less at given output, we can’t know for real without a proper comparison.
Ah I also designed a RGB aux board (hence the RGB pads) but still haven’t ordered it…