Improved Arm for DIY3D's MakerGear M2 Raspberry Pi holder

DIY3D made a nice Raspi holder for the MakerGear M2, but the design of his long arms (AL.STL) made them difficult to print (2 tries, 2 failures) it also required a lot of support material. Here's a quick remix on just that one part so that it prints better (2 tries, 2 successes).
I've consolidated two Thingiverse accounts, this thing was previously published in 2015 by me under a different account. Works well.