Any requests I’ll try and do after work today. Approximately 9 hours time. :weary:
Edit. It would also be nice if anyone had suggestions on a carry bag for this light. Even for transport purposes to stop it getting damaged.
How about this one? Not sure if it would fit though… 
Would something like this be fitting?
134mm head OD
85mm fin OD at button
56mm battery tube
62mm battery cap OD
~315mm total length with long battery tube (ruler only goes to 305mm, guessing on the last 10)
These caps might work for a lens cap, if heated up and pressed on. 133mm
Interesting idea, that could work indeed.
Theres some nice ideas. The pipe cap looks good and ccc bag if it had a shoulder strap looks like a possibility.
at least the head is not as big as “millions candelas” lamps that runs H3 12v 50w bulb we used to “love”, i still have those.
There was once a “BLF lanyard” by Manafont, perhaps now there should be a “BLF shoulder strap”.
or custom paracord strap…
Yes, this light is perfect for a shoulder strap. I put my S70 strap on it and it works fantastic! Review coming tomorrow. Leaving to take some beamshots in a little bit hopefully……if I can put off the important work I should be doing right now……
I reckon the leather lanyard your talking about would be able to handle this torch.
Adsum, that bag does look great for the light if it fits. Maybe someone in China can test fit the light for us.
MRsDNF, can’t wait for more info and some beam shots. See if you can scorch some leaves on that big tree out back.
The weather is terrible tonight in this part of the world so no beam shots. Before I do take them I will have to replace the led as it has a black spot on it which appeared this morning. The cause has not been investigated yet.
Starting with the tailcap.
This picture shows the lanyard strap hole in two different places. The part the hole is in rotates 360 degrees around the tailcap itself. The hole has a diameter of just over 4mm and the width is just under 5mm. Wall thickness is around 1mm.
A view of the top and inside the tailcap. The four holes inside allow the inside of the tailcap to be disassembled.
The three components that make up the tailcap. Everything has well lubed orings on it and should be perfectly waterproof. The lanyard swivel has a nice firm smooth movement to it.
I fell in love with the battery holder as soon as I looked at it but nothing is perfect. the negative springs are on the soft side. I’ll let one of the other members with a light to expand on the technical side of the springs resistance wise etc.
71mm long batteries with these springs should fit ok. Flat top 30Q batteries will work but are not held with a lot of force. The positive button is slightly raised in the holder allowing the flat tops to make contact.
For reliability’s sake I’d stick to button tops.
The ends show the positive spring and negative contacts which make contact with the driver. The spring here is short and strong. There will be no issue with it bending over and contacting the negative contacts.
The opposite end has contacts that allow another battery holder to mate up to it.
The driver itself has a large threaded retaining ring holding it in place. The brass contacts on it are around 1mm in thickness and should never wear out.
And finally for tonight is the battery tube. Threads are square cut. The tolerances they are machined to are in my opinion fairly loose. This could be improved upon to make the threads a tighter fit. Orings sit either end as per a normal battery tube.
The outer thread diameter is 53mm. A C8 will fall through this tube without touching the sides. Styling is plain but fits with the rest of the lights design.
Thanks for the update, :sunglasses: 
Thanks for these detailed pics!
Do you think the tube would benefit from knurling?
How sharp is this part? In the pics looks like it needs some rounding on that edge…
When using a shoulder strap I don’t see a problem there. There is a metal connection between that hole and the strap itself.
Or did you mean for handling?
Though I agree it could have a nicer edge.
Edit.
After taking another look that ring looks at that point pretty thing. Could be a weakpoint. However I can’t think of a way to improve it right now.