Thanks.
Thing is though it could be deep enough, I was expecting a lot more hassle trying to get it working properly, especially with the thicker vial but all I did was cut the nubbin off.
If the switch cover was made with the vial recess very thin it should work just fine with a little mod to the rubber boot.
The top switch cover is around 0.5mm thick if I remember right, plus it had a 0.4mm nub on it and then you have another 1.5mm space with the rubber nubbin removed.
Well, that’s a word I never thought I would write more than once in a lifetime… 
Flickin’ nubbins when clubbin’ will get you a drubbin. 
Yeah, given what you said, seems like one could cut a slot all the way through. I have a SOG Vulcan Tanto San Mai with 3 cut slots in the blade. I discovered two were large enough to fit some trit vials. Because the slots were cut all the way through, I taped up one side to keep the Norland from leaking through. So same technique could be used for installing one on a slotted button cover.
Nice. That is exactly what I do, tape one side or put tape on a very flat surface, hold the item down and apply the glue 
Hhmm - sounds like same trick I do using tape on the inner pill side to fill in USB charging holes with epoxy. I've been using kapton tape actually, and JB Weld. No pics though...
Great minds think alike! 
I like taking $10 lights and making something useful and nice out of them:
Left handed?
yep 
Awesome mod CRX! 
CRX - in swapping to the Noctigon, did you sand it down or did the thickness work out ok or handled in another way?
Also interested in this since I have a L4P all ready to go waiting for a FW3A, lol.
There’s not much difference, I had no problem but I have used a very slightly thinner GITD O-ring, I’m sure the stock one would be fine, a little extra pressure on the MCPCB which is good.
Stock MCPCB = 20mm x 1.45mm, Noctigon = 20mm x 1.72mm.
Nice, in that case the LED4Power one is actually 1.5mm so no issues. Good to see it should drop in most of the good triple boards out there
Do you know if the stock springs are steel, bronze or copper?
No idea, haven’t seen anything about them. Could be silvery coated steel or something?
I did get a slight boost by bypassing them.
Are they magnetic? That would narrow it down
Didn’t even think 
Not magnetic.
Great stuff, as always. What would be the best size kapton tape to buy for this?
I have 30mm wide kapton tape, two strips of this will leave a gap of approx 2.0464mm, I cut thinner strips to fill this but it should be fine without.