Hi,
I do sometimes spin the four patches....that way they will always fit nicely when stitching them together and you can turn them anyway.....I also am not found of pressing seams open....I think it makes the pieces easier to come apart. I find using a shorter length stitch...usually 1.8 or 2.0 on my machine works well....and I tend to use a shorter stitch when the pieces are small and there are many of them....find the block stays together better...I also staystitch about 1/8 of an inch around bigger blocks with many pieces to keep seams from popping open as I always do around the whole quilt top when it is done. I do my own longarming and consider how closely I plan on quilting when done....which is the reason I am not a fan of pressing open as I like to quilt further apart then most show quilts....It gives the quilt a softer feel without so much stitching....I am more likely to hit a seam that is pressed to one side more than I would a pressed open seam to nail it down.....Lin