Does that actually work, though? I never once actually used it while I was on CFX2.
I think GooManager is more than enough.
No, it never did. But a good example of the work and other things like bandwidth it takes to get these working is Dazzozo's implementation of GetCM..
Which is here. Obviously all OTA Updaters are different.
Goo.im is absolutely fine and works perfectly, even better is the integration it has with OpenRecovery script-based recoveries (e.g. TWRP - I made a build but it didn't boot, Lalit made one some time ago but I don't think he has the device config).
Only thing I have against them is that I haven't had a reply from them because I think it's because I screwed up the application by trying to be witty.