My Janome 6500 came with a specific walking foot made for the machine. I'm quilting the first quilt on the machine now, but did a few test sizes for stitch length before starting. 3.4 was what I came up with that looked ok.....a 3.0 would be tiny to me.
I'll play around some more today because I want to make a large sandwich and try out all the stitches the machine has to offer. Thank you for your help.