A scan of my hand that's modified.

There are also a six holes to mount it to a wall using a flat head screw or equivalent. (Don't use all screws at once they're there to mount it in one of 6 directions.)

Printing

the included .3mf file has all parts with most the settings on the parts. 

The base of the model has the speed settings for “0.20mm SPEED” in the “object settings”.

All parts are sliced using Prusament PLA base settings.

Postprocessing

It does need to be glued together. But the base and smaller parts are numbered and the Arm can only be assembled in one orientation. Putting all the smaller pieces in order and assembling the base before gluing helps a lot. Also the numbers are all right side up and 6 and 9 are very different pieces

Put the ring at the base in first! 

It can be a bit tricky to get it in place but it is impossible if the smaller parts are already there.

The hand and arm do have a noticeable seam that can be filled in with a 3D pen and then lightly sanded. However this is not necessary.