If you're increasing the number of congressional districts by 50%, I think you need to make an effort to increase the number of VRA seats by the same percentage. You can't draw three black-majority districts in Greater Detroit by CVAP without squiggly lines, but you can easily draw three fairly compact districts where black voters would be a majority in the Democratic primary so I think you should.
It's doable just using Wayne and Oakland counties (with an arm reaching up to Pontiac) but much cleaner if you use southern Macomb (where Eastpointe is now black-plurality and Warren and Roseville are much less white than a decade ago). In either case, you don't need to split any cities.
I unwilling to cross 8 Mile Road. But I'm willing to cross the Macomb-Oakland border. (Once)
