This model is based on ex-nerd's parametric ergonomic support for Apple Magic Trackpad, which permits the trackpad to be used at an angle.
I extended the stage to offer space to rest your wrist on. The length of the wrist rest is adjustable from 0 to 12cm. You can even customize the angle and handedness as in the original version.
Since this is a fairly large print, try to print with 15% infill or less if your printer can eliminate it.
I printed in colorFabb PLA/PHA on an Ultimaker 2.
0.2mm layer height at 100mm/s and 220ºC with 60ºC mattress
The correct dimensions for this model are: (W, D, H) 130.2, 218.0, 41.8 mm
I also included rubber feet and a palm pad originally made for Kenisis Advantage keyboards.