@ Sudsy & Tally-ho….
Thank you both for the info, I got it posted. 
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Good Job Teach………. Thank You!!
The thermal config is the first thing you should do with every FW3A since they aren’t calibrated at the factory and have a very low default limit set. The two lights I’ve tested so far both throttled down to the bare minimum 1x7135 level (about 135 lumens) because they thought room temperature was too high.
I already have 3 LH351D here to replace the original leds. Now i want to order a new optic.
I want thelight to be as floody as possible. Will the Carlclo 10509 also fit the LH351D?
Yes.
I put some diffuser film on The 3D FW3A Because I was curious if I could change the tint a little and clean up the beam .I used something other than film with adhesive .Cut it pretty close to perfect and slipped it between the O-ring and the bezel .Just thinking that it would be a temporary thing. Odds are I'll just leave it as is since it cleaned up the beam and knocked out some tint shifting .Without the big machine who knows. Only problem I see is the 3D tint FW3A has low enough CRI that you can actually notice how bad it really is .For me it just feels like there's "something missing " Kind of like you're hungry and don't know what you want .The tint isn't the issue.
I'm looking forward to the second round of FW3A's before I start tearing into them to fix cri.
Great light !
Thank you for the info!
Bump……… because this info needs to be upfront, at least for a while longer
/\ … … Yep, if read & followed; it will sort out most of the quote “problems” with the FW3A. 
My FW3A is too awesome for words.
It makes my other lights pale in comparison.
I want all of my flashlights to be great... not just my FW3A.
How do I fix this horrible problem?
Get rid of all your other flashlights. Then all your flashlights will be great since you will only have the FW3A 
Pure logic
/\ …
I found on the Youtube -LUMINTOP FW3A / 3x CREE XP-L Hi (CW) / How to Andúril-UI Operation.
This ultra-detailed operation description is really amazing! :+1:
One thing really good about this — it has helped curtail buying more flashlights. The Anduril UI has spoiled me. Bistro looks good, as it’s also a TK creation… but I prefer the Anduril menu. Also, the FW3A form factor is really great. HDS/NovaTac were really onto something back in the early 2000’s.
Great work, thank you!
I like how it shows what’s happening on the UI diagram. It seems like that could really help people understand better.
However, it didn’t actually show how to change any settings. The light in the video had a badly calibrated temperature sensor, so it would have been a great opportunity to show how to fix that… but it didn’t. And the light won’t really work right when the sensor is so far off.
This is just what we needed, all the intructions/info condensed into one thread not spread over multiple ones.
Apparently, illumn.com, from whom I just purchased my FW3A, agrees with you. In fact, when I received mine, there was a slip inside the box saying illumn.com had already calibrated the sensor. In the process,I am sure they would have picked up and corrected any problems before shipping out the light. Mine was perfect.
I agree too. I calibrated mine right away. They get warm, but not uncomfortably so, and they haven’t stepped down at all yet. I guess that means I am still using them very conservatively.