I actually ended up with a spare driver for my D4 (I thought I had killed it, but the problem was me), so it will probably be the first thing I try to flash stuff on, when I get around to doing that, unless I build a dedicated test setup.

...which I'm likely to do, honestly. A driver, some long-ish 18ga leads, and a quad-board on a spare CPU heatsink. And some kind of battery holder, unless I ever get around to buying a power supply...