I have an embroidery unit on my Bernina, and bought the book because I was curious as to how it was done. I ordered the adhesive stabilser reccommended, but it never arrived, so I stalled at that point.
I don't think I would consider doing blocks like this after the quilt was made, because of the movements the hoop would need to make. I think it would be hard to arrange the quilt so that there was no drag on the machine while it was making the block.
I only ever contemplated make the blocks seperately, then sewing them into a top, but perhaps I was way off with that idea. I will have to go back and re-read the book again.