Thank you for your reply David, it is much appreciated.
I am using a Viltrox DC-50 monitor, so I will test using "force-VGA" and other possibilities. It's a pity also that the monitor image won't display optimally, (it's slightly smaller that the full screen size) but I understand that it's an inherent problem with Canon not solved by ML.
Regarding MLVFS, unfortunately I don't use Premiere CC and Resolve is too slow on my 2009 Macbook Pro. MLV Producer via Wine hasn't "compiled" or created an app that can launch - Probably an error somewhere on my part, I tried to follow the wineskin process but it seemed to have many variables in the creation process. MLRawviewer is an expedient enough workflow solution to create Prores 422 HQ (using the the small code mod I found in this forum).
Thank you again. I'll test and report back any findings.