I saw that post although I would like to hear his direct thoughts on a custom driver such as this. I think the post you are referring to was directed at someone hacking together some kind of franken driver. Last I saw him say about a purposes built driver was C2 was very important?
Hhm. PD68 asked him bout it - maybe in a pm. Check out PD's new driver, maybe.
Which driver are you referring to, the triplestack? IIRC it had a C2?
Dunno - just recall the question, thought PD went with it, dunno.... Got company... sorry...
NP, Hopefully DEL will chime in.
I have one of these built now and running modified bistro tripledown. One question I have always had: why do we shut off channel one and two and only use the fet for the highest mode? Wouldn’t more channels open mean less resistance and more power to the led? I’m sure it doesn’t otherwise we would be doing it, but anyone know the reason?
I tested it and found the results but I am guessing on the cause.
If you run all the channels you won’t get as many amps when at 100%, I saw this the other day. Turned off the 7135’s and amps jumped up.
I think the voltage is dropping in the MCU and it is not fully activating the FET/7135’s.
yes, TK proved that a while back.
Is it possible to have this in 38,5mm as well?
I would love to have Narsil on my to be modded Courui with planned SST 90.
And well I prefer a driver that fits nice in rge light instead of using the default driver just for let power go through, I have the idea that a neatly fitting driver can pass heat of the components to the housing and is thus better.
Anything is possible! Just an FYI: Texas_Ace has made his Diptrace files accessible to us. You could actually download one and expand it to any size you want! Not saying he won’t do it for you. (That’s for him to decide) 
Actual PCB designing seems way out of my league, again a very intimidating thing for me still struggling with basic soldering.
Yeah, that’s what I thought, too. I followed a tutorial for Eagle and realized it wasn’t really all that hard. You can get Diptrace for free and watch a couple Youtube videos, and surely you can at least learn enough to extend the outer boundary of the driver a bit. You don’t even have to move any of the components! Come on! I tried it, you should too! :partying_face:
As for basic soldering, I’m beginning to think I’ll never get it right. But, with tips I picked up here (search bar helps) and a little practice, I can at least get stuff together usually. 
Like was said the source files for all the drivers are included in the OSHpark links for anyone that wants to custom build a driver.
That said I have been debating making one of these for my own DO1. It will need a bit of custom work for the DO1 to clear the battery ring but that should not be too much trouble. Might move the 7135’s to the top side since there is a lot of extra room.
I am waiting to see what happens with Narsil and the R1/R2 before I make any further changes to the drivers. if we can ditch the voltage divider then I will do that on the drivers along with a few other changes.
It would allow for a 3rd 7135 channel in theory as well, which would be nice, or it could be used for an indicator LED. Been thinking about ways to make it optional on the drivers with a resistor if that comes to pass.
I also want to get the 2s/4s SRK/Q8 driver setup as well, in fact I could just shrink the Q8 design once I have it for the DO1 come to think of it.
So basically, yeah I bet I will make a driver for the DO1 at some point after I get the Q8 and other drivers done.
If anyone else have a special sized driver they need/want/know about, please do post here. I really am wanting to create a lineup of drivers to come everything in a single design. Standardization is good.
Oh boy, no pressure... 
I do want LVP without parts too though, still not started yet 
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Yeah, I have a D01 that could use one of these, but I’m in no hurry… yet!
LOL, no pressure indeed. I don’t have time at the moment to work on the drivers anyways
But also for a clicky only driver I am very happy with the current setup and honestly don’t think any changes are needed, except that ditching R1/R2 would be cleaner and less cramped.
So really the changes are mostly for E-switch setups, in which case I figure I might as well wait till the firmware is done to design the drivers around it. Come to think of it, without R1/R2 i just might have enough room for a 209mil SOIC8 pad, although it would not allow me to spread the rest of the design any.
heheh no rush here too, preparing for the darker months here 
Ahhh, k, I'm confused about the 46 mm SRK driver in the OP. Since DavidEF mentioned it over in the Q8 thread, I looked at it. I don't see any LDO support. If it's designed for 2S or 4S use in an SRK, you need an LDO in my opinion. I don't see zener support as well, but zener is not recommended for e-switch lights since the parasitic drain is considerable.
Am I missing something I don't understand, or have not read? Didn't go thru the entire thread.
The driver GND ring is connected to the Batt- of the first cell through the host, to ensure there is always 1S voltage to the MCU, even when using a 2S2P or 4S1P cell arrangement. Therefore, no zener or LDO will ever be needed.
What he said, this eliminates the need for either zener or LDO since it only ever sees 1s voltage at the MCU. The only thing that sees the series voltage is the FET & 7135’s.
I think this is far simpler then using an LDO