I see, thx for the info.
24mm 2-4S buck driver
20-25mm 1S/2S special order with smaller component boundary
Hey Lexel, i made payment 23rd May and last mth 16 Jun you said you should have them out soon. It’s been another month, and been messaging you past 2 weeks with no reply. Can you let me know what is going on?
Lexel,
I want to upgrade my L6. Will your 30mm buck driver work with 3 LifePO4 batteries (9.9V)? Additionally, is it current regulated? Can it be pushed to 9 amps?
I wonder if anyone can help me identify two Lexel drivers.
I ordered one for a ThruNite TN42 and one for a ThruNite TN40S, and I’ve managed to get them mixed up. 
My TN42 is a single XHP35 HI emitter. My TN40S is four X-PL HI emitters.
I ordered these drivers several months apart, and they are slightly different in physical layout. They each have some unpopulated components.
I am not very knowledgeable in driver design. One obvious difference I can see is the values of resistors 8, 9, 10, and 11 on the non-spring sides. Perhaps that’s an easy clue?
I am currently out of town and have no DMM, clamp meter, or power supply. Can anyone tell which is which solely by physical differences?
Click the photos for a larger view.
What differences are you seeing?
IDK, you might need Lexel to answer.
Are they both 12v boost drivers?
Probably Buck drivers.
I’m basing it off the resistor bank above the… can never remember what it’s called.
Circled in these images: TN42 Lexel drivers - Album on Imgur
So your saying the R51, R100, R100 combo coresponds to it being an 8A driver meaning it’s the one for the xpl’s.
The other driver with the R51, R330, R330, R330 combo corresponds to it being a 2.5A driver so that’s the one for the xhp35?
I was just going off the description in the first post; my understanding is that the TN42 was always XHP35, so yep the white driver for boost - but my reading off what Lexel has written is that the black one is for the TN42, or a TN40S that has been modified to run XHP35s.
But you’re right - for a definitive answer, only Lexel can really answer.
Thanks for the replies! 
Ideally, I’d do some bench testing, but as I mentioned I’m currently away from my tools.
I’ll wait for a definitive answer before proceeding. Thanks again!
I found a picture of a high amperage buck driver Lexel made and its using the same 3.3uH inductor. What driver do I need to run an XHP70 or 70.2? - #7 by Lexel
So maybe he uses the 100uH for the lower amperage drivers? (Correct)
The sense resistor bank is very similar between those two drivers with 0.025 and 0.035. So I don’t think thats a good indicator of which is which.
That’s all i can find. Nothing conclusive.
3.3uH is always a larger current -> same ripple voltage for regulation
10uH 2.5A, 3.3 4-7A, 2.2uH 7-8A
Resistor values the same the smaller the combined resistor is the higher the current has to be for same voltage drop
left driver 47mOhms*4.5A=214mV
right 90mOhms*2.5A=230mV
Thanks again to everyone trying to help identify my drivers.
Lexel messaged me and said the white one is for the TN42 (single XHP35) and the black one is for the TN40S (four XP-L HI).
I’m hoping to tackle the swaps this weekend. Both lights will need their battery carriers modified as well. I’m very excited to have Andúril in these two ThruNites.
Thanks again, Lexel! 
I have Endermans 2nd Syniosbeam with your CFT-90, 48 amp driver. I’d like to know the allowable maximum and minimum input Voltages. Instead of powering it with the current 3S LiIon internal and external packs, I’d like to power it with either a 3S or 4S LiFeP04 pack. my LiFeP04 cells are charged to 3.55 and always settle after charging to about 3.47 or about 13.88 pack Voltage. Is this within the allowable range? I’d guess a 3S pack might be too low - 10.41 down to 9.3 pack Voltage.
I’m looking for a couple of 22mm drivers for a M21C to drive a sbt90.2. Please let me know if and how I can purchase some?
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You need to PM him for orders.
He may not check this thread often. 
Any other forms of contact…. FB, email, Instagram ect….
PM works fine. But he might not answer you at the moment because he’s busy with other things.