Sorry for the late reply, lots of other stuff the last week.
No difference if starting recording mode on camera or with your file. Nothing on changing ISO, shutter or aperture while recording. No Cinelike D nor V.
Strangely enough, I did find out that the camera does care if it's in M, A, S or P-mode, no exposure comp in M-mode, just like in photo mode, works in any of the other modes but alas, no control of aperture nor shutter, whichever mode I'm in.
They got this one locked down tight. Thanks for all the help!
PS. Your controller is sweet!