I have the 830 and just love the dual feed , don't even bother with a walking foot any more
give it a go play a little , you must have the D foot on when using the dual feed .
I am off to classes tomorrow e have 3/4 a year all free and the Bernina Tech, take us through a whole lesson ,
we can ask any question we like and learn heaps the class usually goes for about 4 hours. Cathy