Thank you for the quick reply.
Thanks guys. You guys rock!
I just ordered mine with BTU driver and cool white. I’m excited now. A TK70 head with 18650 batteries. I’m in heaven.
The DRY driver I have has terrible PWM noise - stock BTU driver is fine.
I’m using the DRY driver in a TR3-T6, & it overheats & steps down very quickly.
I emailed Ric asking for a free DRY driver with the purchase of a regular BTU in NW. 5 minutes later he agreed. Ric doesnt sleep! I also ordered the better springs.
FF is already down to 14 left in stock. Better hurry if you want one! Thanks to you all for talking me into this great “budget” light. I really wanted a TK70 but couldnt commit since they cant be modified. Another loss for Fenix… oh well!
Now I have 3 more slots for the ton of sinkpads and XML2’s Ive accumulated.
How bright is the BTU driver in high? And does it sustain that output? How are the other levels? What kind of lux does the stock unit produce?
All great questions.
I think guys have told me this light will throw right with the TK70 if not just a little better. It steps down from Turbo which is supposed to be around 3500 lumens in about 2 to 3 min to high at around 2000lumens. Red said all you have to do is turn it off and back on to turbo. And it starts the cycle all over again. That’s simple enough for me.
Just do what I did and get you one. For $99 shipped, and it runs on 18650’s, how can you go wrong?
Good to hear that. I was going to ask you about that. Because if not I would have contacted him for you.
It’s incredibly freaking bright and stays bright, the difference between high and turbo isn’t so much that you would really notice a ton except for when really throwing out a long ways. The low is actually a nice usable walking low and the medium is bright bright. I don’t know about lux but as I said it’s incredibly bright. I will probably buy one again someday.
I would say the one big concern is the size, it really is a tank. I see all the various lights with a handle that don’t really need it but this one could use it for sure. I used the lanyard a lot. I wrapped it around the head three times and it created a kind of handle, but it was a pain taking it on and off each time you wanted to change batteries.
Yea but it really ain’t as heavy as the TK70 with 4 D cell batteries in it. I weighed my TK70 I used to have on my digital fish scales that are extremely accurate. It weighed 3 lbs even. The BTU weighs 1200 grams = 2.64554715 pounds. SO even with 3 18650 batteries you should be under 3lbs.
My BTU weight exactly 1200g loaded. FYI. 
Edit:
For comparison, my SRK weighs 492g loaded.
Also, the UF-T90, 1040g loaded (3x26650).
The BTU is my heaviest light so far.
Are these good springs for the battery carrier upgrade mod?
http://www.fancyflashlights.com/goods.php?id=140
My stock BTU tested at 2880 at 30sec on turbo, 2160 on high, 928 medium, 68 low.
Now with xml2’s on copper - 3670 at sec on turbo, 2520 high, 1025 medium, 75 low.
So even high is very respectable. I never tested throw on different levels, but I’d be willing to bet its still 100k or more on high.
And both tests done with 3400mah protected Keeppowers. And this is the BTU driver.
Is PWM bad with the BTU driver?
I think these are ones I used on one Shocker - really stiffens them up if your not into the soft stock ones. IOS has pretty much the same ones, believe sold as the "A" size. I got them both - went nuts buying any/all springs... If you copper braid the springs though, not sure you really need them.
Down to 11 in stock, really has me think'n.....
Joe - think I read recently the BTU stock driver is not using PWM's at all, but regulated in all modes. The DRY driver does use PWM, and I think poorly -- read this in a BTU thread, not sure where now...
I am real sensitive to PWM and it is not at all visible.I have the BTU driver,not the dry.
How far from your metter when you did that test?
For throw - I’ve done 5m, 10m, 15m, & 25m tests. All about the same results - about 125k stock, 181K with the XML2’s and UCL lens. I have not tried it just high yet though. But a stock high with 2160 lumens it still should be respectable.
What does your meter say for the BTU stock at 1 meter? Did you check it there?