So, took me a lot of design, iteration, a few failed prints and facepalms, and some help from the solder iron in the end, but my bike phone support for my Ulefone 27T pro (a bulky and heavy rugged phone), might be ready for real world testing (and hopefully won't explode on the first bump ).
First project of this complexity on the 3D printer, not perfect, surely a simpler design exist, but this is what i got for now.