Don’t have any pics, sorry. The convoy lighted tail cap switches fit with a little filing to the clear washer. I think if I remember right, the switch fits right in but the clear washer had to be filed until the extra lip was almost gone. You lose the momentary function by changing out the switches.
These are the switches I have used. https://www.fasttech.com/products/1608/10047923/9627747-switch-tail-cap-set-for-diy-flashlight-3-pieces
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I have used the original switch and glued on the resistors and leds and made all the appropriate connections keeping the momentary switch function. But it’s time consuming and teidous soldering. I also built one GFS16 switch with the led board and installed in the V11R. GFS16 - Battery Indicator Tailcap Light & 1mR FET Tailswitch! (Rev B)
The led board can also be installed on the original switch with a little filing and wiring.
Gchart also has a led battery indicator board that may fit also, I haven’t tried it yet but the dimensions are close. Gchart board 15.8mm, V11R switch 16.6mm. It should work setting gchart’s board on the original switch and wiring to the appropriate places.
D.I.Y. Illuminated Tailcap - gChart Editions - #141 by gchart
You will need the clear switch boot. I believe the Kaidomain 14mm x 8mm is the one I use.
http://kaidomain.com/Flashlight-DIY-and-Tools/silicone-tailcaps/14mm-D-x-8mm-H-Silicone-Tailcaps-5pcs