Perhaps you are talking about the Sweet 16 by HandiQuilter?
This is the sit down model, and not one you operate on a frame.
I have test driven the machine a few times and have been quite impressed.
Honestly, I did not like their stitch regulator ... it is bulky and awkward.
Plus the noise of it was off-turning.
I felt I was getting as good of results with out the stitch regulator ... perhaps even better.
You can buy the machine without the stitch regulator ... and if you want it later, just purchase it then.
If you use the search function, you will find many previous threads here on teh QB about the machine.