I STILL DO NOT HAVE THEM.
THIS IS A PIC FROM THE MANUFACTURER.
Thank you BlueSwordM, although I'm not sure about 1, 2 and 3 (A6, X6 and GT Mini).
f.e. the outer springs from the A6 and X6 are smaller (7,5mm) than the one on de GT Mini (11mm).
Also your large (outer) springs are 9mm and don't seem to fit on the contact areas provided, which is 8mm maximum for the A6/X6.
For the GT Mini the contact area is even more different as the outer springs are 11mm and resting on the same measure provided thin contact pad (same for the inner spring), the rest is purple print board, so not like the one full contact pad/circle like on the A6/X6...
Counting only on the soldering to make contact with those provided contact pads doesn't seem perfect to me and kind of misses the purpose of your low resistance springs, or do I mistake?
https://www.dropbox.com/s/py0eqeiy8er4d8u/IMG_20190616_143614.jpg?dl=0
https://www.dropbox.com/s/uohyqxbjry8yqoj/IMG_20190616_143724.jpg?dl=0
Can you post some pictures of the mods you've done please?
:BEER:
- SAM -
Edit: I could do a spring bypass on all of them but wanted a more clean sollution for my BLF flashlights collection :D
I’m going to be out of town for a week at the end of this month. I just know it’ll be just my luck that the LEDs will arrive during that week.
I’m a little surprised to see the J5 flux bin (the highest I’ve seen for 4000K SST-20s) in combination with the less green FD2 tint bin. Usually, emitters get greener as the flux bin goes up.
Ooo, they’ve arrived! Thanks for the update. Looking forward to putting them in my FW3A. Any idea what shipping times we can expect to Europe?
I STILL DO NOT HAVE THE EMITTERS.
THESE ARE ONLY PICS FROM THE MANUFACTURERS.
Sorry for partially getting your hopes up.
No worries. That’s what I get for making an assumption :person_facepalming:
Luckily I put some 5D XP-L HIs in for the time being so I’m happy 
You could use a SnPbAg 62/36/2 silver bearing solder for better conductivity.
Thank you 007, to me that seems a good solution and perhaps a good investment to for future soldering pleasures. Thanks for the tip!
:BEER:
- SAM -
It confirms the tint bin, though!
Yep.
The work I did with my dual BeCu springs in my GT Mini tailcap.
Estimated time for the stuff to be ready? I see the leds are on its way or sort of, the springs not yet…
When should O:) I pay? My emitters are all at $1.55 each (3500 & 4000K), doesn't it?
welp missed out on 219Bs (impossible to find now imo) so I’m hoping these sst20s bring me at least within spitting distance 
@Barkuti, will send you the payments once I receive the LEDs.
@Sam, I took the picture like you wanted. And they fit fine.
Is there a chance that we will get springs and LEDs by the end of July?
Yes.
Will order the springs next week.
I personally can’t wait to get them, especially since the improvement is 20-25% over the 2nd gen while having the same good mechanical properties are the 1st gen springs.
In which way 2nd gen springs have worse mechanical properties versus 1st gen ones? Just the big spring due to some deformation?
Yeah, just the big spring.
See, from the feedback of some members, I decided to remove a coil from the large springs, along with making the top diameter smaller.
While making the top diameter smaller was a good idea for broader compatibility, what I forgot to think about during my calculations was that removing one coil while having a smaller top meant that more force had to be applied for compression, and since removing a coil meant more force per coil was being applied, well…
The spring deformation went from 0,9mm right down to 2,8mm, which was not very good.
The 25% improvement in conductivity was nice, but not worth that large deformation.
So, I took a lot more time on my hands to find a new way to improve the spring, which was hard and time consuming, but lead to these developments:
1. Could change the material to BeCu C17500 45% IACS. Was not going to happen for obvious reasons, being that mechanical properties are quite important.
2. Could change the material to BeCu C17550 60% IACS. However, cost would explode to stratosphere levels.
3. Finally, after a lot of research, and myself getting a new job, I found that electroplating a thick copper layer(20-25um) would result in the same performance boost of 20-25% of the large spring, but while preserving the goal of having good mechanical properties.
And that goal was met, and the improvement is actually even better than I intially predicted, since the conductivity boost of the 3rd Gen springs are applied to both sizes of springs.
TLDR: The 3rd Gen springs are a large overall improvement over all previous generations of springs.
That’s a lot of LEDs.