If it’s P60 then what would the retaining ring be for?
If it was a driver retaining ring, then the driver would block access to the threads, making the head impossible to connect with the body.
I thought that it was a bezel and not a retaining ring
Maybe we’re looking at the business end of the head? Maybe it’s a lantern conversion?
You beat me to that 
Manker U11 18650
NarsilM V1.0 3C1S
L6 Switch PCB
Blue LED
Moon
10K Very nice
AWESOME !!!
That is amazing. Is onboard charging still supported with that setup?
And I need to fix the heat transfer with mine. It remains distressingly cool to the touch even on turbo, which I think just means the inside is broiling itself. That foil looks like a good idea.
Q8 parts progress:
Extended height positive driver rings - will be ready soon.
1.5mm thick brass tail board - machining will be ready in a month. Searching proper way for some coating that will protect board from extra solder and specify place where springs should be placed. No simple ways to do this. 
12x led kit - does anyone need it when MF-01 is available? - aluminium sample #1 will be ready soon, aluminium sample #2 in work, thinking about copper version, thinking about optics holder (upper part) coating, trit slots etc.
A 12x mcpcb? That’d be great if it only requires one pair of wires, and if it’s direct thermal path like Noctigon mcpcb’s. Obviously copper is preferred, but I’d be okay with aluminum if it’s thick and direct thermal path.
No, just regular 4x 3xp boards.
Hank wants $18 for one bare m43 pcb, boost driver could probably cost $30 and this two parts would make Q8 mod too expensive.
In my opinion, four single-die leds is little less than 4x high-drain cells with Q8 driver can feed. So my kit (if it will be ever made) will be defenetly made to use with stock driver.
Any ideas?
I can try to order most cheap thin fr4 boards (same size as tail pcb but with holes at spring base places), so customer would be able to use it as pattern while soldering springs. But this will increase cost by few $.
Another way, I will make a more solid template to be able to solder springs myself. But I still dont see proper source to order them.
Yeah, it would certainly be a nice mod but it will still be a fairly expensive one once everything is added up (MCPCBs, LEDs, your parts, optics). I would not go for copper as the Q8 is already quite heavy but perhaps others would.
No use for a tail PCB as I’ve bypassed it directly to the tube. So it’s only a spring holder now with no electrical purpose.
All tips were given in this post.
A cap for a Schraeder valve on a bicycle/car tire. 
I received the ordered parts today, remarkably well packaged, great overall experince. I can’t wait to try them, thank you!
Kiriba, do you happen to have a spacer for a Convoy M1 Quad?
Something like Dale made HERE
I would love to build a quad M1 !
I have made very limited quantity of M1 quad sets. 15 or 20pcs. They were made to fit Khatod optics because some members wanted to test it and I had to choose one host for it. All were sold in the beginning of this year. This is very unpopular mod, sorry, Im not going to make them anymore.
I could probably found some suitable spacer in my stocks, but main part (in difference with Dale’s mods) of my quad kit is ring that holds optics (and allows to make spacer shorter and shelf surface smoother). Now I even dont have material to make it (ring).
The only thing I can offer - I still have several M2 kits and various VG10 kits (all for Carclo optics).
Received your Cu pill for Jaxman Z1. Fits beautifully and arrived in good time. Thanks kriba-ru!
Received my copper S2+ pill and A6 spacer. Ordered on the 3rd, received on the 12th. Thanks a lot kiriba-ru!
I don’t see those in your OP. Any details about the M2 kits? Copper or alu? Do they also have an optic retaining ring or push it flush against the lens? Or do they fit for use without the lens? I think the diameter of the M2 is about right for that.