Captain Sim, I purchased from you many planes.  I think your work is beautiful.  However, you are seriously limiting the possibilities of your our work by not offering an SDK for your planes.  I have now spent many thousands of dollars (and Euros) in hardware for my hobby.  I'd love to fly your planes and assign keyboard presses to specific functions. Please make an SDK available for the 757 and for the upcoming 767. Absent that, I will never buy another plane from you.  They simply don't work with the hardware I have.  I have no such problems with planes from other FS developers.  Strange that you don't see the value in making the SDK available to your customers, or at least a COMPLETE list of key assignments.   It's your choice of course, but a strange decision from where I stand.