Home Made Dolly
Here is a $150 home made dolly I did with my grand father.
I had watched numerous DIY slider/dolly videos on the web and couldn't find what I wanted: I needed a dolly that could stay smooth on pretty much any ground. So we had to design a new one. It's based on the same idea as most DIY ones you can see on YouTube (roller reels), but our tracks are smoother and more stable that what I've seen so far.

Here is the link to the first tests:

Here is the link to two short movies where we used this dolly:
1) A western short movie, with a terrible sand ground: vimeo.com/21536593
2) It's introduction:
3 photos · 206 views