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Honestly, I wouldn't trust PVC pipe to do all that amazing of a job. Its too light and reacts to the slightest of vibration. You can get steel 1" piping at home depot for something like $10 per 10 feet. Use flush wooden dowels to connect the ends (Gorilla glue 1 end) and drill holes to attach braces on the bottom portion of the piping. Much like was done with the Eazy Dolly.
http://www.eazydolly.com/ Check the vid and pictures.
By the way, the above track that showed in the tutorial only works in flat and perhaps level landscape but it will not work in rough and uneven terrain. That's why I use wood underneath the steel pipe to support it.