When i made mine, I measured and marked them out, I then cut them out on my bandsaw, then I put them clamped together onto the grinder so they were both the same size and a uniform fit, both my grippers are flat against one an other.
I also put a bit of an edge on the tips, just so I could use them like a saw to cut through the gutter gardens, sometimes these gardens are quite long, so being able to cut them helps.