The B-17F had developed some bugs, which are now fixed in the latest version and with the newest DavePack. The bombs should work correctly now. I also changed the way I control contrails in multi-engine airplanes. The single controlling property is still used (.../generic/int), but now it contains a "binary counting" style of operation to represent which engines are running. Eventually I'll convert the two-engined models over to this system. As it stands, the system is limited to four engines.