This is a part meant to replace part "CFDMP_ed-209-head_cut_B.stl" on the ED-209 model by SnapmakerInc (thing:3174875). This will should allow you to pop a google home mini into the head, and obviously you won't need to print the visor piece either as that job is done by the google home. I put a hole in the back for the wire, but the original head_cut_A has no corresponding hole, you'll have to drill one. Print all the parts of thing 3174875 at 120% size!!!
Again, 120% size!
This part is already sized up for the google home, but all other parts will need to be sized up in order to match. Here's a link to the original project, where you will need to go to collect the remaining 19 files of varying sizes: https://www.thingiverse.com/thing:3174875/files. by my estimate this project can be completed in about 75 hours using .8mm shell thickness and 8% infill on all the large parts, Ill post pics as soon as I print and paint it