i was scouting around for a good spaceplane mod (SKYLON in particular) and came across this thread. someone mentioned a video, went on it but found out in the comments Bogeyman had given up on the Spaceplane due to problems of importing the craft to unity and KSP. i'm sorry to hear that the project was cancelled, but you never know, a solution could be found to the problem. This was looking very good and its a shame it was cancelled. But all well, perhaps in the future a bigger, better project will emerge and be succesful!