Developer and Support Tech
If any windows screen appears you are past the potential MBR and/or boot problems that DiskPatch can fix. It sounds like a very specific hardware related problem, and I don't think you need to look in the volume damage area. It's more likely to be a disk or controller related issue. Maybe creating a support analysis log sheds some more light on this, please post one for the current setup.
Does switching disks around change anything? Like, disconnecting the large disk, does that allow windows to boot? Maybe by disconnecting disks and testing things you can deduce where the problem originates.