I just came across a really great tool to make photo or video shots
edelkrone - Surface one
It's a motorized slider which moves along flat surfaces, giving you great crative shots. You control it via a smartphone app.
edelkrone is known for high quality and high price photo tools and equipment.
Check out some videos about it
The only crux of the matter I see here is the price tag:
$839 surface one + $179 flex head = $1018
699 € surface one + 149 € flex head = 848 €
I would say its definitly worth doing a DIY of that.
If someone already has done a how to, comment it or send it to me.
Here is a useful german review