Ah, I have to sheepishly admit I wasn't aware of the ML Focus technique, works pretty well! That's working for me now although I still get a pink display with the other method (5x/10x zoom button).
That the Price to pay for Stable Raw Video
they will work that out in the future .
When you have the overlays on and focus with any EF Lens the focus window pop up.
set the size in the menu. It the best feature i think

when recording Raw the overlays turn off automatically.
You should go though the Magic Latern Menus and check
out all the feature, you may find some very interesting Funtions
It will make Filming alot smoother.