Not sure about the Landing on the Water tower, the sizes do look off, but the landing on an enemy CV is possible. An old squaddie and I de-acked it and i had 2 mins of fuel so i landed and it brought me back to the base.
Edit: after testing the B-17 on Water Tower, it will fit, this pic was taken offline, and i have a film if someone needs it.
As for the CV landing secondary proof is here:
Hope this clear people thoughts about photoshopping.