Why the German twin heavy-Flak idea needs a variant

What was the modified 12.7 cm Dopp Flak idea considered by Germany?

There was no single idea; the workable twin mounting generated numerous Army and Navy proposals, so the exact variant must be specified.

The label modified 12.7 cm Dopp Flak does not identify one clear proposal. Several twin heavy anti-aircraft mounting ideas existed, including systems associated with Flak towers. Once the basic mounting appeared workable, both the Army and Navy spun off further variants. The exact design and calibre terminology remain under-specified here, so the particular project must be identified before it can be judged. One generic label can otherwise collapse several distinct weapons proposals.