Bodhi: The bomb bay on the He111 was a rather outdated design. The bomb bay was not centered, as was the B-17s. Instead it had 2 upright racks. The bombs hung nose-up in these vertical racks. There was a passageway built in between the bomb bays -- not just a ramp, a complete passageway. The bombs were offset to both sides of the fuselage, the racks close to the outside walls. The bomb bay doors were spring-loaded, and the bombs would fall out arse-first and flip around (nose down) in the wind stream. Other early war bombers also dropped their bombs this way, including the Ju86 and I believe the Ju88. The doors were not centered. There was one on either side, and the external bomb racks (the ones you carry the big bombs, the torpedos, or the cargo canisters on) are spaced such that they completely obliterate the bomb bays ability to open.
There is a gap of space between the two racks, but that is not where the bomb bay doors are.
Most did do away with internal loads later in the war, because they carried a very small internal load (1000kg, I think?), and they were very vulnerable to enemy fighters. Most carried external ord only, later in the war.
You can read up on it all you want. Calling me a "know-it-all" doesn't change what you'll find.
P.S... you cite 1 possibly erronous source, and have given no photos. So what's this "I'm able to cite sources and give photos"?
You may feel free to read more on the matter, or you may ignore my comments.