Disclaimer:: The Pico Flex Dolly was not designed to work in this manner. Use in this manner at your own risk.
The Pico Flex Dolly has already been motorized with lasers, so what else can we expect? Here's something quite odd. This is just something I happened upon and although it's not perfect, maybe it will spark some creative ideas for you DIY'ers out there. After removing the sets of wheels, and keeping the two bearings on the axles, there's enough gap to ride on a set of rails. If you need to track a straight line on some 'unforgiving surface', a set of rails will give smooth performance. For a quieter experience, cheap plastic rods would work better. I'm not sure what rail width would be optimal use for something like this and again, this is not what the Pico Flex Dolly was designed for.
Oh and for a solution while keeping the standard skate wheels on the little table dolly, there will be a specially designed roll out mat available soon. Still in the works...