I would like a couple of 32mm slugs for mtg2,
lets go overdrive!!!
Wooody
Exactly what I was thinking. 
I have a de-domed X9 with a 8x7135 driver and to be honest I don’t think de-doming works as well in the X9 reflector as it does in others. A XM-L2 U2 driven at 5 amps or so wont go amiss though. I am defiantly going to make the same thing (but de-domed) with an STL-V2/ SN6X-2 if this goes ahead! (150-170K lux anyone?). 8)
The SN6X-2 / STL-V2 uses the same board, 6th photo here: Review: Maxtoch SN6X-2 [ XM-L 2x18650 Thrower ] OEM Flashlight
I got the Small Sun ZY-T619 coming for $13 cost from the 50% WallBuys deal. Hoping it's internally the same as the X9, but that's ashame de-domed the X9 didn't work well there. Was hoping to get a super budget single cell thrower...
Hmmm, just checked my X9 and its seems to be only operating at 2 amps (again). I thought I fixed that. Regardless: to give you an idea of throw a de-domed X9 with XML T6 at 2 amps very nearly matches a Shadow JM26 XML U2 at 3 amps. I have U3s (and replacement drivers) on the way so will try those.
Anyway: back on topic I have had no response from the above MCPCB producer. Maybe they are busy, maybe they are all on holiday… I don’t know but I will try a couple of Asian producers and see what I can find.
In the mean time: is there anyone here good with PCB design software skills? I have a basic understanding of it (DesignSpark) but not enough… if I had something I could present other then some rough dimensions and requirements that would help I am sure. So if anyone wants to have a play around I would really appreciate it.
PilotPTK would be your man 
+1, he is amazing. He designed both of my 20mm multi-XML boards.
Hmmm, 32mm XM-L U3 for my X9, that kinda sounds nice 
I would like some 16mm for sure and probably a few 32's also.
If they are 16mm ill be in for more
I have made a rough sketch of what I need drawn up on CAD or better yet in a PCB design program: Is there anyone here with CAD skills? It should be fairly easy to scale the design and change the die footprint to adjust it to a 16mm and XPG/E/C board.
Its missing quite a few measurements but it gives an idea of what I am after.
EDIT: One more thing: any dimensions / placement of things you think should be changed on the above? (I know the solder mask needs to be removed from between the anode and cathode of the LED pads)
With that much space, it’s kind of a shame to only put one emitter… I prefer this - they’re wired in parallel, so if you don’t want to populate more than one, no big deal… More flexible….
PPtk
reminds me of this, very pricey but intriguing nonetheless
http://www.led-tech.de/en/High-Power-LEDs-Cree/CREE-Solutions/7-x-CREE-XM-L-U2-on-copper-round-PCB-LT-1847_120_117.html
Huge thanks PilotPTK!!!
Just heading out the door so wont be able to do anything with these until tomorrow but will make some more inquiries then. Thanks!!!
Just realized I forgot screw holes: guessing these are best left to be drilled where they want by the end user?
Sorry about the double post but just got a reply from Altus:
XLampXML2_1 Customer P/N: XLampXML2_1
Description: 2-Layers MC PCB (Without impedance control/ Without blind & buried
vias),Aluminum Substrate , 1 oz starting copper, HASL,THK: 0.059”,Green
Mask, White Silk, Unit Size 0.63” diameter, No others special requirement ( X
out allowed)
Special Notes:
Tooling: $250.00 E test: Included
- Quantity Price Lead 20
time 15days
Extended
Price
Note $378.00
So, not sure if I’m reading it right but they somehow read “copper” as Aluminium and it looks like price for those is around $20 each (when doing 20). Really have to go (late for work)…………
Part of the reason (I suspect) that they quoted you so high is that they quoted “2 Layer” boards. These are only 1 Layer.
To get an accurate quote, ask for the following.
Copper Core MCPCB. 0.8MM overall thickness. Single Layer. 2 Oz Copper. White mask. Black Silk. 1.26” Diameter. No Vias.
No. You can not just randomly drill holes in the board - especially the one with 5 XM-Ls. There are traces that connect everything together. If you want mounting holes, it’s best to pick a location for them and have them put in the cad data.
Not the way it’s currently designed, no. The process used for that type of MCPCB is call “Selective Insulation” or “SinkPad”. I have never quoted a MCPCB made that way, so I have no idea what cost premium (if any) they carry. My guess is that it’s substantial - especially for small volume.
fair enough, and thanks for the detailed reply