Agreed. You have to have a ruler base attachment for the machine to do ruler work. After knowing and having one I would think any ruler made for LAQ would work on any machine. Just remember that the rulers have to be made for long arm quilting. Thses rulers are thicker than those you cut material with or those called french curve rulers.
I started with a straight line ruler and added a clamshell and one called a sunflower so far.
I like them.
Of course it takes a lot of practice, slow your machine down so you have better control. Practice starts and stops.
Let us know how it goes for you and show us some work!
peace