Kinect Holder and Handgrip

This thingi is a refinement of “The Hammerhead - Handheld Kinect Grip” By Toni Buser https://www.thingiverse.com/thing:18125
I saw a few tiny details which I thought could be done a little better. So here it is.
But the grip of Tony Buser is the mother of all.

I wrote an instructables on how to assemble the whole thing https://www.instructables.com/id/How-to-Assemble-the-Kinect-Grip-of-CatweazleMagic/
I think this might be usefull.

What you need to succeed:
- 4x Socket head Cap Screw (Din 912) M3x12 or longer
- 2x Socket head Cap Screw (Din 912) M3x25
- 6x Washer (Din 125A) M3
- 6x Hexagon Nuts (Din934) M3
- 4x Springs Du Ø4.6, D Ø0.6, L25, N10
- 1x 1/4" Tripod Screw (for sale on some Chinese web stores for a few dimes)
- 1x Knurled Nut (Din466) M5
- 1x Plain Rubber Washer SAE AS 568A NBR 219 (8.5 x 3 x 19)
- 1x piece of plain rubber I mm thick (old tyre tube or something like that)
- ¼ liter fine sand. Any type will do (although calculations have been done