It's also ridiculously easy to make. With all the supplies and tools, the build time here is less than 10 minutes.
Video below shows some shots with it. There are still a few jiggles due to the texture of the floor, but you get the idea.
Step 1: What you need
This project may look familiar. That's because it's based off of the CineSkates project on Kickstarter. I liked the shots it was getting, but didn't want to drop $200 for three wheels. i also knew that I wouldn't have extensive use for this. It's fun once in a while. I'm sure that the CineSkates are much more solid and a great solution, but this Instructable costs less than 10% of those.
- Gorillapod. I'm using the Hybrid here, but my camera is also light. The SLR-Zoom or Focus would be better.
- Three rollerblade wheels with bearings. Lots of these can be found on ebay or amazon. These cost $35 (incl. shipping) for a set of 8. There are cheaper options, but I like the color purple.
- Three 2 1/4" 1/4" bolts
- Three 1/4" lock nuts
- Couple of wrenches
Step 2: Drill!
Step 3: Add nuts and bolts
Step 4: Ta-da!
You can get some cool shots with this tripod dolly, but there can be a decent amount of setup for each shot. Try and keep the wheels as vertical as possible and use the direction of them to control how the dolly will move.
Something else to consider is that for a smooth shot you'll want a smooth surface. This rules out many floors, especially for any large circular dolly shots.
In the end, this isn't the ende of the world because viewers can only handle so many spinning shots. I like shorter dolly shots that just add a bit more life than a locked down shot. Doing too much will just feel a bit too extreme.