About this 3D model
I've splitted the part in two parts (top and bottom) as I wanted to hide the cable on the bottom and it lifted the dock.In addition I've designed a pad for the bottom to be printed in flex filament (Ninjaflex, TPU) so that the dock doesn't slip on a glass surface. The two parts are hold together by some 8mmx1mm magnets. The rubber part will be glued to the bottom part. You need:six 8mm x 1mm magnets (https://bit.ly/2VDL13R) No support needed