OK! I followed your instructions, and Ciderpress tells me it copied your DOS image onto the CF card. Now just wait for my CFFA card to arrive, and check it out on my Apple.
Seems like I was taking the wrong path through the Ciderpress program: I let Ciderpress open your image file, and then I was looking for something like "copy this image to a CF card/volume". But apparently, one needs to start with opening the CF card, and then tell Ciderpress to write something to it.
BTW: the DOS volumes in your image, are they 384 KB each (which is the largest size I could obtain myself when using the maximum values for tracks and sectors that DOS 3.3 can handle without much patching), or are they really 400 KB? Just curious...