I don't think they would release it even if they found a way as it would be affecting the Df700 sales. The DF 700 is not a solution to me because I don't build doors even though I can afford a DF700. I don't want a tool sitting in my shop used only once a year or even two. I use the DF500 in 70% of my projects (cabinets, edge jointing, etc.).
Same reason why Festool does not sell the smaller bits for the DF700 so it can be used to cutter smaller mortises like a DF500.
Same reason why Festool does not sell the smaller bits for the DF700 so it can be used to cutter smaller mortises like a DF500.