I have FPsup running on my FP now and it was pretty painless. I hadn't upgraded the FW to 5.02 yet, so I had to do that first and then went to their GitHub and checked the features I wanted, and it compiled the code and I downloaded it. Unzipped the files, placed them onto the root of my SD card and popped it in...
Sure enough it worked... my FP can now shoot OG2K, OG3K and S16. An initial test at home went smoothly. I was even able to get 30 seconds of OG3K recorded to the SD card for 30 seconds before I stopped it. It was a static shot, so I assume that helped. Gonna head out today and see what some movement will do on a busier shot.
I'm really interested in the 3.5K in 2:1 but I assume I'll have to use an SSD for that.
As far as the FP-L, I assume someone will work on it. The Dev isn't planning to do it, but he kinda pointed people in the right direction.