Was working both our Vortex's 150 / 180
Made a new cover and caded up and printer a new cover for the Runcam Split 4
After a few mistakes it fits in the original location and hardware, used the short screw that come in the box with the Runcam to screw the main board to the 3D printed case, both units are flying in 4K on board recording, also hooked up the UART to the GPS port with a connector I got from eBay, the up side is the video appears to be clearer as both units we have are running 16:9 on the transmitted, and records 4K on board. The UART allows us to turn on and off the recording, needs to just set up in the modes as the manual says. As for the micro SD card we used a 128Gb U3 as recommended.
FYI, The green unit is the Vortex 150 and the white is the Vortex 180.
Manual - https://www.runcam.com/download/split4k/RC_Split_4k_Manual_EN.pdf
RunCam - https://shop.runcam.com/runcam-split-4/
Camera available here
https://www.amazon.com/RunCam-Split-Camera-Latency-Recording/dp/B08BWWXK49
https://www.getfpv.com/runcam-split-4-whoop-14x14-fpv-4k-hd-camera.html