Hi Eileen,
Thanks for starting this group. You can add me to the Gammill family...

I just bought my Vision 30/12 with a 14' table in August 2012. What a difference it makes from machine quilting!
I absolutely love this long arm!
I have the TOWA thread gauge and its been very helpful.
The one thing I've had difficulty with is that I can be in motion in the middle of a perfect curve and hit a slight resistance. When you're in motion any little resistance can sure mess up your game! I'm not sure what causes it, tension, thread, the table?
To determine if it's something on the table, wheels, or guides, I would practice my motion while the machine is not running.
It glides perfectly with no resistance. So I've eliminated the possibility of something interfering with the table, wheels, or guides.
So I focused on tension. I bought the TOWA and use it every time I load and clean the area for a new bobbin. I found that this has helped but I still run into the resistance just not as bad. It's still a bit of a challenge but I've come to the conclusion mixing and matching the right thread, needle and tension plays a big role in a smooth effortless motion. The pros can correct me if I'm wrong suggestions are welcome.
I'm also curious what stitch length you folks use and are there times when you use a stitch per inch of 8 vs. 12 and why?
Also the speed you run at. I haven't found that balance yet as to when to increase or decrease the speed.
Happy quilting everyone!
Barbara