The newest revision of the rail kit (see Update #3) is designed to work with any pipe that has an outer diameter between 1" to 1 3/8"
PVC pipe works fine for shorter length rails, but will begin to flex with longer lengths, or heavy rigs. Wood curtain rod, or wooden dowels are the best solution that I have found- they don't flex and they are still very affordable.
If you wish to add another Revolve dolly to any order, simply add $70 to your pledge amount. When we send out the survey at the end of the pledging period, you will list the second Revolve as an additional accessory.
Yes! The threaded portion of the guide rods extend out of the mounting hole, so that you can screw friction arms (via adapter included with each friction arm) directly to the guide rod to mount your accessories.
Don't see the answer to your question? Ask the project creator directly.