I for one, there are plenty of things I would be willing to do with a SW file (eg STL) and with the SW applications that I master but I would not necessarily spend 200 USD if it is not the right time frame 
. What I like on this forum is the diversity of profiles.
@Dynamik, while waiting for someone (could be @Flying_Rodeo 
) to submit the .stl file of a propeller that works well, could you write a table with coments or improvements regarding the list below which made the creation of this forum possible … Then we know that a 3D printed propellers bends at high rpm which is detrimental to the efficiency, creates slip, etc… . Could you suggest some recommendations (thickening the blade roots maybe ?) that lessens this effect without loosing too much on global efficiency ?