alecsandros wrote:... The main resource, which AFAIK, was not improvable or modifiable in a reasonable amount of time, was dockyard space to build additional capital ships. Launching 5 more capital ships pre-requires having 5 more dockyar-spaces for them, which AFAIK did not exist anywhere in GErmany. I guess anyone would choose 5 more Bismarcks
I didn't say anything about additional construction, let alone 5 Bismarcks. What I suggested is more or less what was historically built. OTOH, you seem to be suggesting that Germany has the capacity to do major reconstructions on 5 capital ships in addition to what was historically built.
alecsandros wrote:2 Bayerns and 3 WW1 battlecruisers...
Derfflinger / 27000 tons / Kongo / machinery up to 28kts, range up to 15000km at 15kts, fire control suite, AAA systems, torpedo defense.
I suspect you're being a bit optimistic with some of your numbers. Derfflinger is going to have to put on a lot more weight to be relevant in WWII, particularly in terms of deck plating. I'd reckon you're looking at a ~30,000 ton ship for Derfflinger and Hindenburg. As far as the Bayerns go, its a little more complicated. You'd obviously need to add a fair amount of weight and 32,000 doesn't seem totally unreasonable, but that will also serve to slow the ship down further. Given that and the relatively short/fat hull (which limits space for machinery in addition to being relatively inefficient for achieving speed), I'm not sure how feasible even 24 knots is. Remember, the QEs were longer, leaner, lighter ships with more power on tap, and 24 knots was about all they were good for.
Bearing that in mind, lets say you're up to ~150,000 tons of capital ship tonnage, versus 535,000 for the UK (carrier tonnage was distinctly separate, and if the Germans were smart, they'd invest in carriers anyway). Now you've got a slight problem: you don't have enough tonnage remaining to build S&G. Even the Panzerschiffe would be a problem, as they were capital ships as well by virtue of their 11" guns. Historically the Allies let things slide in that respect, but in the face of a belligerent Germany that's again on the rise, one which already possesses 5 capital ships, that's less likely to be the case.