I have made several GFG quilts and have hand sewn the hexagons together without problems. The EPP is too involved for me right now. I have no problem "eyeballing" the 1/4 inch seam. It comes with practice. Learning to get the corners to come out nice takes a little practice, too. Hexagons are one of my favorite shapes to use in piecing because you can do so many things with them. I have the half-hexi ruler but I prefer not having the seam in the middle of the hexi. I cut mine from strips using the hexagon template to cut the edges.