Thanks Woke at 2.30am and couldnt sleep so I went out to the lathe. It is a bit rough and i dont have oring for the bezel. Kaidomain reflector 38mm diameter 42mm deep, I put a 1mm2 osram in it that was sitting on my table but turned angry blue on turbo so I put xpl hi in.
Lots of great info here! I did the oring tailcap mod and am very happy with the new stiffer feel.
I ordered a new pocket clip made for a HDS, looks at though it’s gonna be a perfect fit. I’ll report back when it arrives.
Did the DarkSucks clip fit?
Hope you like it an hit the button as hard as i need now ;)
www.youtube.com/embed/sijO2Lc7cIM
Nice before and after comparison M4D M4X 
After watching that I’m curious to know how much pressure is needed for the o-ring mod.
Why copper wire though? Does current passes through? I was wondering if I can use a paper clip! 
I had it lying on my desk and with insulation it was too thick - so I stripped it :D
a paper clip might be too thin
Got lucky and found a metal landyard ring that was nearly the perfect dimensions for this light. A few minutes with a sanding drum and dremel to open the ID ~1mm and here we are. Also bought some suspension clips off of ebay. I’ve been trying out this combination for a few days and it’s growing on me. Takes some getting used to for sure as it’s not the easiest to get the clip to catch without focusing on it. I’ll say that when wearing jeans that have stiffer edges and tighter openings, it’s much better. I’m sure I’d still prefer a genuine deep carry clip on days I’m using the light heavily but I just haven’t got one yet. For less frequent use, I would recommend it highly though. The light feels so much smaller in the pocket with this setup.
That pressure for the copper ring is shown starting around 5:33 in the video Max posted above.
Max, can you add the info for the rubber ring mod?
i need to find a matching ring ;)
I can take the same measurement this evening of my switch activation pressure and comparing it to a stock FW3A I have still. I’m not sure how much has changed since the original batch and v1.0 design, but note that’s what my samples are.
I’m can’t for the life of me remember what light (or other thing) that the lanyard ring came from/with. I’ll try searching the web for something similar
I’m not referring to difficulty sourcing the clip, but rather the low profile lanyard ring that goes in place of the pocket clip.
Btw, while they are cheap and work okay, the clip that you linked (and that I initially bought for testing out the idea) are really poor quality. They claim to be stainless steel but are not. In fact they aren’t steel at all. Some kind of lot melting point alloy (tin?) with a plastic coating. I naively attempted to heat color a clip and found this out pretty quickly. I’m looking to buy a USA made titanium version after I give it a week or so more trial time.
What I think the rubber/copper o-ring does, is it provides equal pressure around the perimeter of the blister switch membrane. Which requires more pressure to achieve the break-over pressure required for the switch to close.
Whereas the “nubin” concentrates the pressure at the very tip/center of the blister switch, requiring less pressure to achieve the break-over pressure needed to close the switch.
So, no.
As long as the metal ring has no sharp edge, from cleaving with a cutter, it should work like the copper ring.
But I do think the rubber o-ring would cause less abrasion on the surface of the blister switch surface membrane, than a metal ring would.
That’s my 2 cents, which is probably not even worth a penny.
Doh! Sorry, yeh I misunderstood.
Is the ring from armytek ?
That’s what I don’t know. It was a random lanyard in a plastic bag in a draw full of lanyards that happened to have that ring attached. No idea what it came from.
I asked because that’s what it looked like to me. I don’t know exactly.
This is correct. It’s a combination of force distribution and mechanical advantage that causes higher activation pressure.
Solarforce has, or used to have, lanyard rings that would probably be just slightly too small inner diameter for the FW3 tube.
The Solarforce ring works well
But you have to enlarge the inner diameter of the ring to fit which makes the ring a bit thin so you have to be careful.