Hey DOTTYMO,
Thanks for the warning. I have the same problem with FMQ on the DSMs. When I'm at our sewing circle, I tend to get reminded by other ladies that it's time to get up and walk around.
When I"m home, I forget. I'm already sore from the weekend's sporting activities though, so I'm hoping my body will limit me naturally tomorrow. All the reading I did said that the Juki was a fantastic machine, so I was thrilled when this one dropped into my lap. Hopefully I will have a sample of some sort tomorrow.