|My ZZ machines are fritzing, so I switched to a semi industrial straight stitch machine. I was doing top stitching and realized that it was much easier to keep the lines straight with the straight stitch foot and straight stitch throat plate.
I tried my limping ZZ machine out with the straight stitch foot and throat plate and darn if it didn't work better on the ZZ machine too! So, if you are having trouble edge stitching, stitching in the ditch or other fine straight stitch applications, try switching the feet and throat plate! (the straight stitch throat plate has only a tiny hole for the needle as it doesn't have to allow for the needle to move left or right.) WARNING WARNING if you do have a ZZ machine remember not to put the machine on ZZ until you change the foot and throat plate. You will not totally ruin your machine, but that needle sure will break!