Hopefully, it is. If not; I fear the the last resort: hack saw :person_facepalming: I hate to mutilate a beautiful and perfect light 
Mutilate? It is just a poor man’s CNC machine. Lol
Add a little black marker to hide the raw aluminum and you won’t even know. Plus it’s completely covered by the head when together, which is 99.9% of the time.
A needle file might make a smoother cut, but not everyone has them.
All the control modes and functions are focused on a single switch, and I'm worried about how long it will last with a high lifetime of frequent clicks
You can get a replacement switch assembly from the Sofirn store on AliExpress for about $2.98
Yep… here is a link in fact. Go ahead & get you a spare or two while the getting is good. I sure did…. 
$3.01 is the latest price it seems.
https://m.aliexpress.com/item/32879434650.html?trace=storeDetail2msiteDetail
By the time the switch would wear out there would be a whole new Next Level of Technology flashlights. Lol
I’m pretty sure the switches are the usual cheap ones and I replaced a couple of them in different lights meanwhile (not Q8 up to now).
Just received my Q8 via Amazon AU. Oring problem here too. Reapply grease to no avail. Has fasttech orings helped?
They worked just fine to replace the damaged O ring on one of my Q8s - but the original worked well until I messed it up :person_facepalming:
If the problem is not the grove that the O ring sits in they should fix your problem
Did anyone else notice the AR glass is actually a bit thick? The non-AR glass is 2.85mm and allows the bezel to sit mostly flush, but the AR version is almost 3.1mm and leaves a noticeable gap behind the bezel. Output difference is about 4.5% for me.
So after a year of usage my backlight to the button decided to crap out.
Recently it was mostly dead as it was just flickering and getting dim but if the flashlight was activated and turned off or the batteries pulled and closed then it came back.
Now its just dead, dead dead. No green light whatsoever no matter what I do.
Other than that it working without any issues, and ultimately doesn’t bother me much but if I can fix it I would.
I have taken apart the flashlight and saw the basic things like wires are attached nothing appears to be rattling, but haven’t completely torn it down
Any one have any idea what should I look for? Burned out diodes or resistors? and where?
Or can I purchase the button assembly and just replace the whole thing?
The fault seems to be inside the pcb, it’s unfixable. The only way to correct it is to replace it.
Still in need of a replacement. I have not had a working beacon since about 3 weeks from purchase. Responded to the PM with my full address, and never received a response. That was on 11/5/2017…
Interesting. I would have not expect PCB issues at that low of a voltage and current.
Well if there is a way of purchasing replacements then let me know where.
Otherwise I’ll live with it
Here are the replacement parts.
Use the link in the above post, choose “color” and it shows the 3 seperate parts. The switch is $3.04.
There was some type of a defect in the pcb of the original switch. It had nothing to do high voltage or current.
I don’t know any of your details. Who did you PM? The Miller? He may have left by then. If you need a replacement switch, the only place to get it is the link above.
Here is a link to a new switch.
https://m.aliexpress.com/item/32879434650.html?spm=a2g0n.shopcart-amp.item.32879434650
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Edit: I’m a slow typer… look like this is old info. 
Great thanks guys! I’ll order one.
For the PCB. In my experience if they pass their initial QC they are good unless exposed to elements or chemicals.
I’ve seen some prepreg core cracking when doing high temp burn in but that was relatively freak accident and on high power board that were under a lot of stress
All those that have the q8 for a long time now, does it still work like a charm, the button is not weared out etc ??