Just finished adding a camera/mirror purchased from AliExpress and the rear view visibility (1080K) issue is history, it's a perfect upgrade. It took about 3 hours to run and hide the rear camera wiring (get the longer 10 meter option) and to tie into the back of the cigarette lighter for power which turns off when the ignition key is off. The unit also has a front facing 4K camera with loop recording and you can also get it with GPS but I did not. Price was excellent compared to the Wolfbox unit. (probably made in the same factory) I did not bother tying it into the reversing light option, the camera/mirror is on all the time and I refer to the rear back-up guidelines on the Grenadier's infotainment center for direction. 140 and 180 degree of vision upfront so excellent visibility all round. Comes with a 5W power plug for inserting into a standard cigarette lighter, I purchased a female 12v plug from Amazon and connected the two and wired them into the back of the Grenadier's 12v lighter so it's all hidden from sight with no power cord running along the floor and over the center console. I purchased the 10" mirror which fits perfectly and the front camera in unobstructed, I contemplated getting the 12" mirror but its too big and unnecessary.
) I'm interested in how well the image provided faithfully represents the actual distance of an object from the rear camera compared to a flat mirror. My gripe with convex mirrors, (and wide angle lenses), is that it's difficult to judge the closeness to the rear of one's vehicle of an object -be it anything from a car to a 64 wheel road train (!) to judge sufficient room with an adequate safety margin when merging, or resuming one's lane after overtaking.... the slightly convex external mirrors on my Grenadier, the Hyundai Santa Fe and my wife's Subaru respectively are problematic in this respect. I've come to the conclusion, rightly or wrongly, that my expletives uttered (silently of course! 
