Maybe add to each sheet a "window" showing that particular fragment of the aircraft with wheels down, but with outer wing and engines "cut off"?
(by "window" I understand something like next to 3rd plane from top:
https://dl.dropboxusercontent.com/s/vsk ... _pol2a.png )
I might have figured it out a -quite obvious in retrospect- solution: freighter and converted freighter variants. After all windows and cargo doors aside, they are essentially alike to their passenger counterparts, especially when it comes to their underbelly. I can show passenger versions with gear up and freighters with gear down and the goal of beign concise and comprehensive at the same time is achieved.
If You or someone else would need to use blanks for AU, then I can send them on PM, but otherwise I'd prefer to post "official blanks sheets" together with completed series.
Perfectly understandable. In case I'll PM you.