I wanted a mag safe dash mount to fit in the car, I'm too tight to pay the price for the official Brodit mag safe adapter so made my own. I'm also too tight to pay for the official apple mag safe so bought the anker one at ¼ the price from amazon.
I've designed this to screw onto the existing brodit iPhone mount in my car using the existing screws. I see no reason why you can't use the same screw holes to attach this to anything else.
I've made it from PETG as it gets a little warm in the car for PLA. I'm in the UK so can't say how well it will hold up in warmer climates, but I reckon it's fine for the UK weather I guess I'll have to wait until next summer to find out.
Edit: NOTE: THIS WILL NOT FIT THE OFFICIAL APPLE MAG SAFE CHARGER.
To my knowledge the apple mag safe adapter has a square profile on the rear whereas the anker is curved.
edit 2: Updated to note the model number this fits is the Anker 313 magsafe.