This is an upgrade to the Dummy 13 model. This upgrade features a replacement forearm with a rotating joint as well as interchangeable attachments for the joint. 

Be sure NOT to print this part in PLA as PLA will degrade over use/time so that the joints become more loose.

Anyone looking to remix this with fun colors to use in an AMS is free to (with attribution). You can paint alternate colors in PLA onto the decorative portions but the joints should remain PETG.

Installation / Assembly

To install, simply connect the alternate forearm onto the lower end of the Dummy 13 standard elbow/knee joint piece on whichever arm you prefer. Removing the standard forearm can be tricky if you have already assembled it but it is doable. This part is much easier to remove, however it does not feature an integrated elbow. A Dummy 13 standard knee can be printed and installed as an elbow for more color and to limit the range of movement.