Posable magnifying lens

This model is the first accessory for the “BJ2010” system that I've just released.
It allows to mount a magnifying lens to a ball joint arm that will allow you to precisely position the lens where you need it.

If you wish to reproduce the whole assembly you will need also the following models too:

• BJ2010 ball joint arm
• BJ2010 pipe terminator mount
• pipe table clamp

additionally you will need 

• a 20 mm pipe of the desired length
• few M4 screws and bolts 
  • 8 x 20 mm m4 bolts and nuts ( for some parts shorter ones would work better but 20 mm should work for all of them )
• a magnifying lens (I've used a 90 mm diam. lens with a 3mm thickness at the edges)
• an adjustable clamp

I'm also providing the FreeCAD files for all the necessary components in case you need customize the parts for lenses, clamps or pipes of different sizes.