I was a bit skeptical at first when @
shiumai told me about his magnetic plans at a meet. But I had the chance to check out the finished product firsthand yesterday and can say that it is very solid and secure. I would be confident driving at high speeds with it.
The magnetic strength is very strong, to the point where it takes some effort to pry the license plate off. The most notable was when i proceeded to reattach the plate. The law of attraction took effect, pulled the plate out of my hands, and snapped back in place. I kept saying sorry because it snapped quickly and loudly. Good thing he had the felt tips to prevent scratching!
Very inventive alternative to screws or if you don't like the offset look with tow hook kits. Thanks for the DIY. Very well done!