Don't read the instructions on the batting package. Instead, think of the use to be made of the quilt. Will it be heavily used and washed. My guide is a quilt should have a consistant of density of quilting overall without large areas unquilted. If for a child then more quilting may be required If a bed quilt and only used by adults then the ditch may be sufficient. So think of the use. I don't know how a company determines the closeness of the quilting. Do they make one and quilt it at various widths wash, drag it around, wash it again etc etc etc. I'm going to ask someone at one of the companies this question. What test did they make. Also how do you want the quilting to show. Would quilting in ditch and then 1" out from the ditch add a decorative touch to the quilt. Would an X in each block add to the appearance? For me, scrim, needle punched, no scrim makes no difference in my decision.