Mounting socket for WS2811 Bullet Pixel LEDs

I set out to make my own DIY permanent holiday lights for my house using WS2811 "bullet" pixel LEDs. I bought generic vinyl j-channel from a local home improvement store and drilled a couple holes to test the fit. Each pixel is made to clip itself in, but I wasn't happy with how it looked. A lot of the pixel body was sticking out the front of the channel which doesn't even light up. Having that much of the body stick out makes them much more visible during the day without any benefit. I've included a photo showing how much the "factory" pixel mounting sticks out versus what I wanted to see.

So, I decided to design a socket that would hold each pixel where I wanted them to minimize their visibility during the day. After 15 iterations, I finally reached a design I was happy with that printed reliably.

#### Installation

I started by drilling holes in the j-channel (I don't remember the exact size, maybe 1/4"? You may need to do some te