I don't have an answer for you but I wanted to share my experience with those templates. I got some templates from Marti Mitchell and John Flynn. John's templates have the dog ears cut off and Marti's didn't. Marti's templates worked better for me because my mind (old school) couldn't wrap around where to start sewing with the blunted edge. I finally figured it out but my pattern came out much better with the dog ears left on. I think you have to give it a minute to get used to.
I'm with Holice when it comes to using a pinking blade. You would have to measure from the "valley" cut to get an accurate 1/4" When you're piecing the blocks together if the valley's don't match up it would be hard to see your 1/4" seam.