Adjustable-angle tablet-stand with print in place hinges

PLEASE SEE LATEST UPDATE BELOW! This is my design for a print-as-one (print-in-place) hinged tablet stand that can be adjusted over a wide range of incline angles. I was looking around on thingiverse for something of this nature but could only find adjustable ones that need screws and nuts to assemble, or some other post-print assembly. I thought there must be a better way! This will work straight off the print bed. Just peel away the brim and VERY CAREFULLY loosen the hinges and you're good to go. I've been using it with a large 9.7" Galaxy Tab S2 with a case on and it supports it nicely and feels very stable. When you first unfold it, the inner two parts have to swing all the way round the outer base piece so that it brings the supports on to the top side of the base where the position notches are located. Then to put it away flat, just rotate all the way round to the back again. There may well be a few improvements that could be made to the design, but I would welcom