Plane COG Balancer Add On

In addition to the Plane COG Balancer https://www.thingiverse.com/thing:3227802, it can be helpfull to have it balanced even without a plane on.

To acheive that, this device has a left tank that can be loaded, and is hooked on horizontal bars touching the ruler left side.

And to ease stability a platform is added with COG axe mark. Adding weight on this platform will help the whole stability

EDIT 14/12/2018:
Version 2 is easier to print as it includes support for the right hook and red