Just looked at the thread again for the PZL driver. It just reminded me that not only was wight always coming up with the latest and greatest drivers back then, he always stubbornly insisted on his drivers being aesthetically designed as well. Things had to line up, have symmetrical spacing, etc. Every driver was a work of art!
Yeah, “back then” it seemed like I was the guinea pig, I built everything he and MattAus came up with, including a go at the Knucklehead driver. lol
With my memory, “back then” was yesterday, I still use those drivers all the time, even still have some of the huge 07N02 MOSFET’s…
If I recall correctly, Comfychair started all that. I even learned to flip the big 07N02 upside down on a Qlite in those days…
Yep, comfy set the stage, wight wrote it down in traces. The old HD2010 drivers were the inspiration as I recall - pure spring melting, LED desoldering power!
Indeed, and the HD2010’s reflector would exploit that welding class in a hurry…
I really don’t want to know exactly how much I’ve spent on driver components, boards, li-ion cells and flashlights. I don’t. But I know it’s in excess of (Edit: lets just say it’s excessive). 
Speaking of the hateful HD2010, I once took this outside of the box approach to bring the emitter into the reflector for proper focus. That was the light that started me modding, it didn’t work right out of the box and the extended process to get it working and working well taught me a lot… lol
For you David… I don’t think we ever got the Knucklehead working… not for long anyway…
oh, not trying to call you a knucklehead just reminiscing about the drivers those guys came up with… this one was one of Matt’s I think (MattAus)
Yeah, back then I couldn’t understand anything you guys were talking about with those drivers, so no surprise I don’t retain any knowledge from those times. I “remember” the knucklehead driver, but I don’t know anything about it unless I go back and read about it again.
I kinda got pushed into thinking about these emitters a little while ago, and the idea came to me to use the White Flat’s in a reflectored triple. I like small well made lights, anyone know where I can get a good price on a Brass MecArmy PT16? 
Thank you for the information about the drivers.
I thought: Hm, PLZ that is “Postleitzahl” (= German for postal code), maybe its something else. 
I put something together
testing out the right values for the CC part will need some testing
the 2 blank copper areas are to solder a piece of copper wire likely hammered flat to spread heat better
So, this driver needs a heat spreader? Wow! 
Thanks Lexel! Are you planning to build/sell these? If so, when do you think it will be done testing and ready to buy?
You should sell these to Hank so he can make D1S with White Flat.
Hank is right now not interested in white flat D1S, I tried to offer him driver but he said
it may happen later we will see
hmmm I wonder why. Seems like there should be enough demand. Maybe he’s having a hard time centering/focusing it?
when will this be ready for order? also will it be a 5A buck driver?
Any news on a CC driver I can fit in flat white D1s?
Any updates on your driver, Lexel?
I put one together, albeit much more rudimentary than yours. 5x CN5710 (dual channel: 1+4) for 5 amps linear. Working good so far. Without any reflector height tuning, got 958 lumens & 273k lux with a Flat White 1mm² (vs 1540 lm & 127k lux stock driver with XP-L HI)
how much for this driver? and do you ship to Thailand?
I need to do more testing before I’d consider selling them. I sometimes ship internationally. But international package shipping from the US is quite expensive too, ~ USD $13.54 just for shipping.