I have used a twin ( double ) needle (one shank two needles attached) and stitched with the ditch in the center and the stitching is on both sides so if it wavers it is not noticeable.. worked for me.. and looked good too.
The needles come in different widths between the needles and I think I used 6.0/100 or 4.0/100 it depends on the look you want.. also instead of stitching in the ditch you can just stipple or meander the whole quilt .
Good luck and have fun..
Judi