http://www.freemotionquilting.blogspot.com/
If you watch thes tutorials, it may help with free motion quilting. Somewhere, if you dig into this, there is a picture of Leha using the supreme slider, which she also sells on her home page. She mentions the website during the message. She also critiques the Janome Horizon, which I bought and love. Would recommend and if you negotiate hard, you can get it for much less, about $2,000 if they are hungry for a sale, no table included or extras.
This tutorial is great for new or betinning FMQs also.