There was a limit on space and like how the bombs in the He111 are in a vertical arrangement which limits internal ability to carry more, it was done that way to cut down on space needed for bombs and to streamline the aircraft. Bomb bay design advanced as the war went on, but in the case of the Ju288 it's back kept breaking because it's fuselage had a lot of stress put on it's slender frame due to the way the bomb bay was laid out. The Mosquito had a tiny little bomb bay that required existing bombs to be heavily modified to fit in it. Again the He111 and He177 were intended for different roles than the Ju88 was when ordered, but the latter was required to do missions it was not intended for.
Nobody said that bomb bay of He 111 was ideal.
I've perused the book by K.H. Regnat about the Ju-288, there is no single mention of a picture of a 288 that crashed or was otherwise destroyed due to supposedly weak fuselage. The fix for the 500 lbs bombs in order to fit on Mosquito was as simple modification as possible - the stabilizers were trimmed down.
Two things interfere her: 1st - I don't have a book, 2nd - with 200 € is above budget for us no-rich.
The Do-217 was nearly killed until Milch took back power and put it at higher priority to lessen the dependence on Junkers aircraft. Junkers, had it gotten the Ju288 contract would have replaced the He111 and killed the He177. The Bomber B was supposed to replace all medium bombers and even take on some of the strategic bomber roles too:
https://en.wikipedia.org/wiki/Bomber_B
Dependance to Ju 88, not 288, that was a two year later design than the Do 217. The Do 217 was a far better bomb truck than the Ju 88 at any rate.
50kg bombs actually have a ton of utility, the heavier ordnance was intended for missions the Ju88 wasn't supposed to even undertake when ordered in 1935. Later it was decided to put it into a bunch of roles it was not initially intended for. The Ju88 wasn't meant to be as fast as the Bf110, nor was the Bf110 intended to do the tactical bombing missions expected of the Ju88 (until 1940 the Bf110 wasn't intended to be a bomber at all).
Since the range was stipulated to be 2000 km for the 1st examples of the Ju 88, with slight increase as war dragged on, it certainly was not designed as a tactical bomber. This is why they have had Ju 87 in production.
The Germans didn't know about the Mosquito until 1942, so the fact that a better "Schnell bomber" was invented by the enemy later on with even more radical speed concepts (wood, no defensive armament whatsoever, 2 crew) is meaningless. Certainly having a DB603 ready in 1941 was possible with some technical PODs and would have made the Ju88 into a very interesting aircraft.
I've posted nothing meaningless. A bomber with a better (or not worse) bomb bay than prevoius designs is certainly not ASB territory, and plays nicely to the fast bomber concept.
http://www.warbirdsresourcegroup.org/LRG/ju88g7.html
Ju 88G-6.
The G-7 was with 2-stage supercharged 213E, unlike the G-6 with 1-stage supercharged 213A. A year apart in OTL.
Not sure if that would really be that necessary, but would probably be better than the Me109.
Starts with 125 L of internal fuel more than 109, or ~30% more, as-is.