Sorry I never machine a binding on. I just don't like the look of the stitches on the back. This is my personal preference and I admire anyone who can keep those stitches in the ditch.
Surely we should have rules studied in shows to keep them fair. I entered a show and found any piece in the categories I had selected needed to be 1 metre in at least one direction. Wall hangings are frequently smaller and I had to extend.
Being at one show a lady asked if I had seen any quilts which had been hand quilted not these all the same patterns. To her they were wrong if it hand quilted.
Binding , I will practice but not sure it will catch on with me as I love to curl up on a cold night and hand stitch.