[Adam]

Ruy,

sounds good, the only thing would be perhaps - especially with the Luftwaffe - it might become confusing. Do the Jabo Staffeln get posted in the fighter, ground attack, bomber or what? Thus, maybe if the sub-categories are split along the lines of:

Single engined
Multi-engined
Sea
Other

Splitting hairs perhaps but that way aircraft of unknown or mis-identified units aren't wrongly posted in various sub-forums, thereby creating more work for the mods to remove and swap them into their proper forums once identities are known. Also, aircraft that served with frontline units then moved on to a training role, or vice versa don't have to be double posted if the specific date of the photograph is unknown.