Please review my espalier plan
After much hemming and hawing I have come up with a plan for the espalier orchard I would like to plant in the fall. I have a space that is 56' x 8' and I want to squeeze as many fruit trees as I can into it. I'm not bothered by the fact that different types of trees will grow differently, I want a variety of fruits more than a piece of living artwork. In the back row I plan on training the trees into informal fan shapes, while the front will be kept as low 'stepover' cordons.
Does anyone see any major flaws with this plan? I tried to choose fruits that are tasty and come on relatively small trees.