3dconnection , the leading manufacurer of the 3d mouses has several models to choose from.
The flagship of them , the spacenavigator pro , gives you all the possibilities to pan , zoom and edit your 3d design, but also with an added geometry for ergonomic working. But at a price.
This is not the faqt with the spacenavigator , which has all the other possibilities , but no ergonomic arm rest.
Therefor this design was made and 3d printed for you in strong and flexible plastic.
With this 3d printed support , you get a more ergonomic rest for your arm during your hard 3d CAD drawing hours.
It was designed and tested by engineers which use spacenavigator pro all day and also use the spacenavigator for work.
The 3d print fits snug on your excisting spacenavigator and its very lightweight if its needed to take with you on site.