As mentioned in the comment under my DiiMO Photo, there is no special adapter required for the SE/30 version DiiMO, unlike Daystar cards. So even though NEXTRO does charge a lot for the DiiMO, you do not also have to pay for an expensive adapter! And as I mentioned above, the 030-based DiiMO is more compatible with software than 040 upgrades, plus I myself found it to be fully compatible with IIfx and IIsi ROMs when used in conjunction with my 1.4MB floppies.
In addition, the Micromac DiiMO web page also mentions the fact that the SE/30 DiiMO plus right into the logic board with no special adapter (scroll down the "Installation" and read the second to the last sentence). But keep in mind when reading that page that (a) Micromac no longer exists and no longer sells the DiiMO themselves (they sold all their DiiMO stock to NEXTRO Japan), and ( B) the photo used on that web page is NOT the SE/30 version. To see the SE/30 version, you need to refer to my Flickr photo.