The AoI model contains blanks for a square drive hole and a round one. You will have to set the dimensions of the appropriate one to that for the latch-turning shaft in your door and subtract them from the handle to get the correctly-shaped hole. Also, there is no hole for a grub screw - the door I fitted mine to just needed the handle to screw onto the shaft (which is easy - just make the hole about 1 mm undersized and then the metal shaft will cut its own thread when you screw the handle on). You may need to add a grub screw hole.
File:Door-handle.aoi - Art of Illusion file for the door handle
File:Door-handle.stl - STL file for the door handle