Changed the Utorch UT02 from a boosted XHP-35 thrower to a totally different kind of light… built a Zener modified FET driver with 8.4V LVP and 7 modes with reversing action through the e-switch, stuck it in the UT02 with an MT-G2. 
Edit: On a pair of 26350 cells fully charged it makes 3600+ lumens.
Edit II: Tail current shows 5.96A from the little fat half cells.
Since my C8F white flat re-flow didn’t pan out I put some shaved dome SST-20 4000K’s in an 18650 C8F.
I got 50kcd and ~1,700 lumens
It doesn’t look very centered to me so i’m sure there’s a better result if you just had to have a 95CRI thrower.
Do these cell’s make my tail look fat?
LOL, I think they’re cute but YMMV….
Built a C8 to try out a single unique XP-L HI I bought a while ago.
It’s an XP-L HI 75CRI 5000K…when I compare it to a V2 3A I guess I would say it’s about the same spot along the BBL but it’s slightly cooler white?
Anyways, got around 1,270lm and 108kcd… believe it or not my first C8 mod. The LED is nice but I probably wouldn’t spend $7.35 on it again cause the usual suspects seem good enough (V2 5D and V3 1A)
That F4 is a freaky light.
I was only mentioning the Olsons because of a recent post I saw of a D4 converted to them. The beamshots looked quite throwy for what it was. I just thought it may be interesting to have a small form factor tube light with two different optics and emitter options to give a potentially more versatile light depending on task.
Today I stacked a Convoy C8 driver up to 12x 7135 in total. Flashed with my modified Babka firmware and replaced XP-L HI led with Osram white flat 1mm2 led and Astrolux C8 smooth reflector because it is a tiny bit better than Convoy reflector. Focus almost perfect first time and it throws very well
Nice mod Zozz. You must have terrific soldering skills. 
Thanks! I solder at work every day for almost 14 years now. You can minus 3 years from that at another workplace so 11 years of soldering left. But I think I soldered first when I was 8-9 years old
The C8 with White flat:
And our Christmas tree at work by one of my collegue:
Tree with the C8:
That Christmas tree is adorable ! 
For you modders, a battery test… I used the 458 Ham’r with it’s 17 emitters and 5 MOSFET’s to just find out what cell gives what… This is a single cell powering the Ham’r, 10 top cells, couple of surprises…
1. Samsung 21700 30T ————- 30.3A
2. Samsung 18650 25S ————- 28.0A
3. Golisi 26650 Gold ————— 27.0A
4. Sony 18650 C5A ——————- 26.2A
5. Samsung 18650 30Q ————- 24.9A
6. Sanyo 20700A Red —————- 24.5A
7. Efest 20700 3000mAh ———- 23.4A
8. iJoy 21700 3750mAh ———— 20.4A
9. LiitoKala 5000mAh (Black) - 19.5A
10. LG 18650 HG2 ——————— 16.7A
Dale Where can I get Samsung 25S that will ship to Europe? I need some for a very high power build
E.g. Here https://www.akkushop.de/de/samsung-inr18650-25s-2500mah-max.–35a-36v-37v-li-ion-akku/?gclid=CjwKCAiA9efgBRAYEiwAUT-jtPpZO-ADExdhY11vqhRnQcTA3kD5eKKL61FEserbL8z5EVKJ_2NiCBoC4SAQAvD_BwE
But I didn’t found the country “soldering iron” in the list of countrys they ship the items.
That’s very bad for HG2! Were the cells old, abused or something?
He’s a hungry person.
OK, I knew somwhere in east europe.
Shipping is expensive, but possible: Ungarn:14,90 €
Ungerne, aber doch 
Yes! Hungary. Thank you!
A friend of mine that uses the HG2 also thought that read was low, he expected it to be as good or better than the 30Q. I have two of these, neither are very used cells, but not new either. The 30Q in this test was brand new, first time charged. I’ll recharge both HG2’s I have and test them both again to see if I just got something wrong…