Whoops, I realize now that my last post was a little confusing. That's what I get for trying to post from my cell phone.
I don't use my Brother for FMQ, I only use it for piecing. There is a very large and wonderful Yahoo group for that machine, I recommend you join it. There are many members who do use it for FMQ who can help you.
https://groups.yahoo.com/neo/groups/PQ1500/info
And please don't be afraid to adjust the tension!! In my honest opinion, there is no one machine that can automatically adjust the tension for you when you are quilting. There are just too many variables: what size thread you're using, what size needle, how fast or slow you're moving your hands, what kind of batting you're using, etc. Every good longarm quilter I know tests (and sometimes has to adjust) the tension on her machine after
every bobbin change. You simply need to read and learn as much as you can about tension, then quilt some practice pieces so you can see what happens when your top tension is off, when your bottom tension is off, how to fix it, etc. It's like cooking. Once you learn how, it's much better and more satisfying to cook your own food rather than let McDonald's cook for you every night.