Can Any Graphic Designers Suggest Things They Use Keyboard Maestro For?

The main thing I want KM to do is replicate items over my page. To explain. I design business cards on a 55x89mm page size. Once the design is complete, I change the page size to SRA3, then select my business card image, move it to the top left of the page, replicate it across to the right, then repeat this using alt cmd U & return (it used to be simpler). Then I group the three items, replicate them DOWN the page once, then use the above keys to replicate the grouped set, all the way down until I've filled the page with 24 business cards.

This is very tedious and time consuming. I have made several failed attempts at this, and have ALMOST got a macro to do this, but it doesn't seem to want to copy the items in an exact straight line horizontally, but offsets them a fraction - so not sure what I'm doing wrong, any help would be appreciated.