3 cells in parallel, powering one emitter.
What does (did) it do when using alkalines/NiMh, does it use a carrier (one for series, one for parallel)?
It’s set up just like the King/Kung lights. The positive end makes contact with the large donut style brass driver contacts. Same kind of pcb in the tail, screwed to the battery tube, with 3 springs on it.
It made pretty low output on Alkalines, considerably brighter on Li-ions.
That stock driver must've been a linear/boost driver then. It wouldn't light the LED at all otherwise, with only 1.4/1.6v.
Supposedly it would do some 650 lumens on Li-ions and around 350 on Alkaleaks, but that wasn’t the case in my lightbox. Around 80 lumens with Alkaleaks and 230 with Li-ions.
Not anymore!
nice platypus. 
So you were planing / would like to put a 20DD with 70N02 FET into your roche F6?
Yup. Started a separate thread here: https://budgetlightforum.com/t/-/26078 (also, hot F6+TIR action shots) :8)
Seemed like some curses were in order and, well, Perry get’s cursed every day and seemed like a likely candidate. 
I went to a great deal of trouble to get the reflector bored out neatly and smoothly, finish sanding the cut with 600 grit sandpaper til it was velvety smooth. And yet, putting it all together the silicone on top of the emitter still got cut. Luminus surrounds the die with that oddly shaped X type “window frame” and then put’s the silicone dome inside it with flanges of silicone that cover the frame on top. Having the reflector seat on top of this frame cuts the silicone off and makes little bits and pieces that stick and don’t want to come out. The lens itself appeared pretty doggone clean after the cutting ( I used a new carbide bit in the Proxxon ) but at this level of magnification it shows much more “stuff” in there than I realized.
Still thinking about doing a light orange peel effect to smooth the beam profile but as I really like the quality of the reflector it makes me hesitate to do so. Can’t go back from something like that and there’s no readily available reflectors to replace this one.
Nice mod. I may have to copy you. Yeah, you're right, the Rook has terrible parasitic drain.
Requested pics, and then some…
The Rook doesn’t have parasitic drain anymore, with the new driver in it. And now it’s even got a bit more heat sinking, for what it’s worth…
The gap between the added heat sink and the walls of the head isn’t as big as it appears. The space measures 1.03” and the rod I cut that off of is 1”. I know, I know, I meant to fill the void with thermal adhesive but got in too much of a hurry, now the light is put back together and I’m not sure I can get the driver/contact board back out. I’d been using a screwdriver to punch it out through the switch wiring holes in the driver shelf, but now there’s not much of a hole there, as it’s covered by the aluminum heat sink. And the sink itself is strongly glued in with thermal adhesive. But it does help, on high it takes about 20 seconds longer to feel the heat coming into the head. 
Lot of work for a 20 second extension, no? lol
I was playing around with the Rook some more, looking at the artifacts in the beam profile, and decided to frost the reflector. I found that I still had some reflective clear Krylon from a previous project so I used it on this. Might have gotten a bit carried away, meant to have less of a frost effect but oh well, it is what it is.
It still has a hot spot but the artifacts are gone, the beam profile is very pleasing now and it’s much more of a flooder. I’ll have to take lightbox readings again and get some beamshots…the cells are on the charger.
I got beamshots of the Rook as well as the C8 that is equally equipped. Since they are the only 2 SST-90 emitter lights I have, and they're both running the DD FET driver, they are a head on comparison. Because I took the frosting of the Rooks reflector a bit too far, the Rook no longer has as intense a hot spot and the throw suffers for that, as seen here.
The Rook is the base shot, mouseover for the C8.
Looks like maybe I get to see if this paint will come off and start over... don't know.
Oh Goody! I get to polish the reflector! Which means that de-natured alcohol didn’t take the reflective paint off, so now it’s ugly, of course. Beam profile isn’t so bad, but it’s ugly to look at the reflector. So I’ll polish it. Start over.
They look neutral white, is that what they look like in person? Do you know the tint or output bin? Where did you get them? I think I need a SST-90 light ASAP.
hmm… I wonder if the rook and the sky-ray S2 are lego-able. It looks at first glance the might be. A little battery flexibility is always nice…
I got em from Kai domain for $14 ea. bare, stuck em on Noctigon MT-G2 stars.
I got all the paint off from last nights venture. Also got all the silver reflective surface off. Now it’s a gold reflector. No kidding, gold as it can be…the brass plating to allow the vapor discharge coating to stick. Actually looks pretty cool just like this, but of course I won’t stop here. I will, however, get some lightbox readings on what it’s doing when in this state and I took a photo… will share that later when I get it uploaded.
War Hawk, this things got a ~35mm x 35mm reflector in it, the little 10mm TIR wouldn’t work at all. But thanks! I actually do have some TIR optics, hmmmm… think I’ll just polish this aluminum one, it’s nice and heavy, will add heat sinking to the equation.
Always wondered what reflector looks like down to the brass under layer. Hope you post a pic eventually.
I have a 35mmØx16.4mm LEDIL single TIR on the way, whenever it gets here you can have it if your interested, I went a different route. Another cool option would be a fresnel but the guy that sells them is out of 38’s right now.
I’m curious to see the reflector now.