Part E and Part D look a lot alike. If you follow the pictures it is easy. Wait until the end to shove the pieces into each other with force.Tomorrow I will level the ground and put the cover on it, lay some bricks on the edges and load in my plants for the winter.Nice product, feels sturdy. I may be adding a solar waterproof exhaust fan to the top front. Put a few hooks on the fence to anchor it from wind/tipping.I am very pleased with this purchase. The depth is nice also, not as big as the others which is perfect for smaller spaces.I recommend this product and it shipped FAST! Thank you…