I hope this will help you.
the question is who can do this on a lathe
Good Job 5ar!!! :+1: I like it! 
What plastic did you use? Can someone make one for me if you have a 3d printer?
Protection ring or latern extention?
If the price is good, I would buy the protection ring right away…
For lathe I mean a lantern extension, basically a bezel with a bigger base to mount a tube on it with diffusor and cap
The original bezel is fairly slim to mount anything on it with enough mechanical stability
I dont feel this parts usefull…
But my PM is open for any custom drawings.
Nice!
The button top diameter of my older 30Q from Banggood is about 8mm though - so I fear your ring won’t fit all button tops.
You're right. My batteries have a 5mm button top diameter and everything is fit. I did a change for a larger diameter of the top button.
https://www.thingiverse.com/thing:2627854
Thank you. I use colored plexiglass.
I’ve seen a lot of super impressive lumen numbers using fresh cells at turn on and 30 seconds… even from mostly stock lights.
Has anyone measured lumen output with 30Qs once the cells are more depleted… say 3.2ish volts?
Or is there a way to extrapolate lumen output from the data that has already been collected?
Thanks!
Here's some #'s I recorded a few days back:
- Modded, bypassed Batch 2 light w/stock AR lens on HG2's at 3.56V: 4490 @start, 4320 @30 secs, on full 7135: 180 lumens
- same modded, bypassed Batch 2 light on HG2 solder tops at 3.35V: 3600 @start, 3300 @ 30 secs
- same modded, bypassed Batch 2 light on HG2 solder tops at 3.3V: 3440 @start, 3090 @ 30 secs, on full 7135: 180 lumens
- same light on 30Q BT's @4.20V: 7480 @start, 6870 @30 secs
Well I this afternoon cleaned up properly & modded both my Q8”s.
First I sanded the top of the battery tube where it makes contact with the ground ring.
Then I cleaned & very lightly sanded both the positive & negative contact rings, after ensuring the board was sat flat, & where the screw holes in the tail board contact the battery tube.
I then tinned the screw holes in the tail board where they contact the battery tube.
Lastly I swapped the tail board screws for brass ones.
All this gave me an increase of about 400 lumens from my previous stock reading taking it up to 5860 on start up on freshly charged 30Q BT”s at 4.20v.
I then removed the tail board again, ripped out the small thin inner springs (just pulled them out quite easily) & bypassed the springs with 20awg silicon wire soldered to the board by scraping some of the red coating off halfway between the spring & screw hole.
This resulted in a start up reading of 7650 lumens in my light tube & 6950 at 30 seconds again on 30Q BT”s at 4.20v after 30 seconds.
I am extremely happy with the gains for what are simple, cheap & straightforward mods/cleaning up :+1:
Fun to see the output jump like that after a bit of personal involvement, isn’t it? 
I’d buy two! I don’t know anyone with a 3D printer, though they seem widely available.
Why buy them? Because I know some day, down the line, somebody is going to get hold of my flashlights and not know what’s not safe to do with them.
Yeah, I know about making things idiot-proof (Nature is always coming up with more clever idiots ….). But I think it’s important to try.
The factory screws sit below the level of the positive contact plate. Nuff said.
Yes it is 
I had previously only seen a big jump like this when I “solder blobbed” the S70 (not that I have done much “modding” previously).
Does this show that the ground path on the Q8 is not very good as stock & in particular the springs are giving a lot of resistance ?
Or does it show that the Q8 is easily modd”able as was one of the design parameters ?
Either way for the extremely low cost of a few cms of silicon wire & 4 brass screws & maybe half an hours cleaning/sanding & soldering the results in terms of lumens gains is fantastic :+1:
Sort of a combination of those things Ian, the springs are typically gold plated steel for mechanical function, so the bypass is always a gain and in the case of 4 cells and 4 emitters it turns into a large gain. Not that factory lights are bad for having springs made of steel but in this case the ease of modification makes it a big plus. Welcome to the world of improved EDC!
Hi Dale, the Q8 is a bit big for me to personally class it as an EDC light 
Then again as I am on the list for a GT, then in comparison to that monster, I suppose that you could call the Q8 an EDC light
In the fall and winter with a jacket or coat, the Q8 is handy enough. When it’s hot out and we’re wearing T-shirt and shorts, well, the Q8 is a bit more difficult to have tagging along. We had a brief taste of cooler fall weather but are back up in the mid 80’s as usual. So it’s T-Shirt and shorts with sandals weather in November. Nothing new there. Need to figure out a good lanyard mount for the tail cap……
Mid 80”s is your usual fall weather 
We don”t normally get mid 80”s in the height of summer here in the UK, maybe 1 or 2 days a year are that temperature & not every year.
It is Autumn here now (fall ?) & the last 6 or 7 nights we have had frosts (temp below 32f) & maybe 50f in the day.
Only good thing is that at the moment it is dark from about 5pm to 7am so 14 hours of dark.
At the height of winter it will be dark from about 3pm to 8am but temps will be down to low 20”s F at night (maybe 10-15F) & daytime will struggle to get above 32F 