i purchased your dual footprint PCB with 5050 but yet to own BLF Q8 
waiting for sofirn Q8
@led4power
Really sorry to hear this!!!
One friend of mine (not on the interest list) bought 1 and you shipped out mine today (although i am not modding my Q8 now). But i wanted to have at least one board before its gone.
Hopfully more people will mod their Q8 when the Sofirn Q8 is out (the battery tube extension will make modding much more easy) . And i really hope that you will get your money back (+ profit).
Maybe someone from the Sofirn Q thread (i think we know someone 
) can do a little bit of advertising for the modboard?
Yes, the Q8 v1.5 which uses battery carriers will make it very easy to get higher voltages. Then someone like Lexel will probably make a 6v DD driver that fits. Then we will see some 50.2 conversions. Right now it’s very hard.
I am surprised that only that many have sold to be honest. I know I got 2 of them, although I have only used 1 so far.
Part of it could be lack of exposure that they are available. I didn’t even realize they were finished until some time after you had them but then I am not on BLF much these days outside of my own threads.
Do you have a test of the MZ? I had not even heard of it before now.
Does it come in Neutral tints?
Koef3 tested the MZ, even this colour temp and CRI. But L4P has a higher output bin for sale than the one tested.
Many tints and CRI are on the datasheet but if you look out for leds for sale in small quantities, the choice is limited. Mind that the MZ comes in 3V, 6V, and 12V.
Thanks for the link. This is really interesting.
Do we have any DTP mcpcb’s for this footprint yet?
I am thinking it could be a nice replacement for my EDC triple if it can be found in ~4500k tint and it does not have green in the beam.
It has the 4040 footprint, like the LuxeonV, and Led4power has a number of boards for it, including DTP boards.
Lumileds have generally nice tints that are not above the BBL. 4500K is not an option, either 4000K or 5000K. It is a quad die so in a flashlight you will have to take measures against the donut hole.
Thanks for the heads up, last I looked the only ready made mcpcb was the Q8 one.
Darn that 4500k is not an option, guess I will need to get a nice 4000k and 5000k and see what I prefer.
I am not that worried about the donut hole, I will use a beaded optic. So far they have taken care of any tint shift or beam deformities I throw at them with minimal losses as well.
You could also mix the two. Make your triple into a quad and use two of each, or decide which you like better, and use two of that and one of the other in your current triple configuration.
I just ordered two of the dual footprint Q8 boards yesterday, probably should have gotten more but to date I don’t actually have a Q8 anymore. Have one coming and will probably get another so I thought two would do me, but I’ll probably revisit that and get more. Both of the light and the boards. 
I did actually buy several drivers along with the boards though. Don’t really have a plan on where to use them but how could I resist?
Is there a 20mm triple 4040 mcpcb? If so I might consider that although I am not sure that the MZ LED would work in a triple optic since the dies look to be off-center?
I have mosX 3xV: 3xMZ 20mm
I just tried it with 10507 optics, cross center is just a little bit of center vs. TIR center, but what is much more important, tir hole is smaller than die surface area, TIR opening is ~3.6mm, while die array is ~3x3mm, so part of light can't enter TIR. But since PCB is white, some of that light will eventaully get out of flashlight as flood light. More concerning is possible optics meltdown from too much optical power.
As expected, there is donut hole in center of beam with smooth TIR, frosted TIR should fix that.
Thanks for the test! Did you take a lumen measurement with it by chance?
I wounder if the optic was drilled out like they used to do for the XP-L if it would work better?
I actually prefer the 10511 optic myself in my EDC, I think they should get rid of the dark spot.
What tint options do you have on the MZ LED’s right now?
This was just bench test to check the beam,sorry no lumen output.
IHMO, drilling TIR hole is not good idea,this is crucial part of any TIR optics, if hole surface is not mirror smooth,light will not refract nicely anymore. More potential damage than gain.
I currently have 5700K 90CRI version, R flux bin (1 or 2 bins higher than Mouser's reel according to Maukka's measurements).
Yeah, I have never been a fan of drilling myself but in this case it could help eliminate the dark spot I figure and improve the lumen uptake into the optic, so might be worth it.
I never ordered mine since I never received the confirmation e-mail after registering on led4power.com and as I hadn’t much time for modding at the time, I gave up.
I tried with different email addresses with different web-browsers today, same problem.
I really would like to order several others thing from L4P now that I have more time. I just need a few days to prioritize a couple of mods that I’m going to make first from the dozen I would like to do.
EDIT : was able to complete the registration process 
I voiced interest in one of these boards with the plan of doing a SST-40 and/or a Luxeon V mod. I’d still like to, but the increased availability of high-CRI NW 3535 emitters with decent output cooled my interest in low CRI builds somewhat, and a quad Luxeon MZ is a little outside my current budget :).
I still plan to order one or two (if still available), once I figure out a larger order with a driver or two and a perhaps some emitters.
FWIW, Ledil has some optics specified for use with the MZ. Unfortunately, the only multi-emiter options are on a square grid.
just ordered 2
Is there any modding I need to do to thr blf q8 light for xhp50.2?
Yes, convert the battery and driver to 6v. Sofirn will be releasing their new battery tube and carriers soon. Those can be converted to 6v, then you just need a 2S driver.