Very nice 
Sweet switch mod. 
Added red
Wow, that’s actually a very practical mod you did there Chadvone, great for lurking around protected urbex sites.
Here is my old post of my switch mod
Same as already suggested.
That’s cool, what’s happening there?
Really simple. Cut the trace on the single 7135, cut trace and isolate a single led on the quad, replace with a red xpe. I did it on a Emisar driver first, then ordered a TA driver from Lexel that he drilled a hole and separated the single 7135.
I adjusted Anduril ramping tables.
The way the ramping works, single 7135 for the lows now runs the red led.
How I wish the Proton Pro would of worked.
Very clever!
I was originally planning on a single hi cri led. Still might swap out later.
Firelight2 I am waiting on your switch bezel. I looked for some washers at the hardware store but a no go. Did you get it glued on?
Wow. Nice file work on the washer.
Yup. I ended up installing the washer on my D4 with bare aluminum head. I removed the flip-up cover in order to install the washer. The washer is glued on with Arctic Silver Thermal Adhesive. It can take the heat, is strong enough and the silver coloring helps any bits of glue blend in with the head.
I think it looks great! Much better than the flip-cover did. Downside is the washer doesn’t provide nearly as much protection from accidental turn-on compared to the flip-cover.
For the washers: I also looked in my local hardware store and didn’t find anything suitable. Steel finishing washers were available, but I find them too hard to file down. Nickel Plate Brass works well because the brass is easy to file down with a hand file and the nickel plating looks great. Best place to find them is probably Ebay or Amazon. The size you want for this light is #14.
My plan now is to flash Anduril in this light and install one of Lexel’s aux LED boards.
Hm… I wonder if Lexel sells LEDs to light the switch. I’ll have to check.
^ That is an awesome job. That is how the Emisar light should of came out of the box.
I tweaked Anduril to give me memorized level from lockout instead of momentary moonlight. Just for those time I need to pull it out and see something for a few seconds.
I pm’ed AEDe about a switch bezel(he had some nice ones for the H03) but didn’t get and answer back. I think I will have to give your mod a try.
I think with the washer bezel and the firmware tweak this could be a sweet EDC light.
I don’t have a D4s, but it looks like the switch is more recessed, anyone?
Yeah, That is what I am seeing. Wish they would of done this on the D4.
Wow, amazing mods! chadvone’s is genius. I don’t have anywhere near the required skills or patience!
I can confirm the D4S button is recessed 1-2mm.
Showing that to my wife 
I bought Lexels Aux Boards for the D4. Does the D4 Anduril Firmware support the Aux switch, or do I need to install the D4s variant?
If it’s the same as mine, there’s no firmware involved. The aux board is hardwired to battery plus and minus