Perspective frame

Wanna learn to draw? Got no talent? Then this is for you. Transform 3D objects to 2D plane is complicated. I do not guarantee you, you will paint like Monet or van Gogh, but the device really works.
It is not my invention, actually, it was used 600 years ago (and may be even before):
http://www.npg.org.uk/learning/digital/portraiture/perspective-seeing-where-you-stand/the-drawing-machine.php
Even such genius like Vincent van Gogh used an alternation of this device
http://www.vangoghreproductions.com/art-techniques/perspective-frame.html

This thing i designed is a modern aproach to this device. Not all parts are printable, you will need:
Plexi (perspex) sheet A4 (ca 21x30cm)
Wooden lath 2x3cm x ca 45cm
4pcs screws M3x25 with nuts
4pcs cable binder 15cm
tripod (in my case Velbon CX 480)
and sure the printed parts

The construction is easy

Draw grid onto the plexi according to your needs (i am using squares cca 5x5cm)
Mount the plexi holder on front end of the lath (sc