I remember fitting coils on a handheld video camera and they suggested to open the coil and take one wrap around the coil then close it back up. That would prevent it sliding?Aw cheers ! Am I going to Shirebrook ? I dunno, am I going to Shirebrook ? Should I go to Shirebrook ? When is Shirebrook ? So . . . Probably a No then ? I must have missed that one . . .
Ferrite - in theory, yes, closest to the camera. In practice closest to the source of the RFI, except I cant see where it is on mine (and modern cars really should be shielded so its no longer a problem, but mine is). My cable currently comes down the inside of the windscreen and lies on top the dash to the door pillar. I've got the ferrite there. It tends to slide back towards the door pillar and stops working, the image starts doing the funky gibbon wobble again. I've currently got it held in place temporarily with a piece of bluetack so it stays next to the windscreen and doesn't slide. It seems to cure the issue, but I'm not sure I've really got the source yet.
Bottom line - trial and error, and only if you have the problem.
Tony.