Im trying to get rid of all series (and full humbuckers) to I'm only either using the inner coils or outer coils, controlled by a single DPDT switch. Should I switch a pickup off I want each bucker to remain in split. So for example if i'm bridge only, the DPDT switch will dictate which coil is active still (inner or outer). I've used to diagram below which is a 3 way on/OFF/on switch thinking that it will still work for inner and outer (as its an on/on switch currently) but it is switching between either pickup instead of either coil.

Im not interested in having the humbucker setting, but this should still work right? I have tried connecting all the north finishes and south starts to the shields and back of the pot and have the DPDT act as a coil selector (with the hot to the pickup on/off switches in the centre of the dpdt, coil hots on top and bottom) again, a bit less noise but it still seems to only activate either bucker, not inner or outer coils as expected.
I've spent 2 days wiring different ways but to no avail, its sending me loopy. Can anyone help?