I also had a problem with stack up tolerances on my machine, so I bought the "Perfect 1/4 inch foot". Turns out it is NOT a perfect 1/4". I took a good look at the packaging, and to my suprise, it says <1/4" by design. I had to do some stitch outs to determine that I have to nudge the need a little to the left to get a perfect 1/4" seam.
This is a good tip! Sometimes solving a problem is as easy as looking at it differently!