Side Shields

PlexiGlass sides
Forum discussion in Dust protection - Rail cover.

Metal Shields
These were available from the upgrades store: http://shop.shapeoko.com/collections/frontpage/products/shapeoko-side-shields (no longer available when last checked).

Paper
https://github.com/tbfleming/Shapeoko-Kirigami

Duct Tape
Duct tape Side shields: http://www.shapeoko.com/forum/viewtopic.php?f=5&t=6048&p=55305#p55305