I'm using PFPX for my Pilatus PC-12 flight planning so having created an aircraft profile for it I was keen to do the same for TOPCAT so the fuel and payload could be loaded directly into the aircraft. This saves a fair amount of time from doing it manually.   But in order to create a new aircraft in TOPCAT it has to be based on a template and the PC-12 is not listed. These template files are encoded so cannot be created manually. Essentially TOPCAT is useless for me for the PC-12.