Yeah, I bet your back hurts! All that structure looks great! But those logs and stumps will want to float. Before my pond filled, I bought some cheap metal fence posts and sledgehammered one next to each stump, then drove nails through them to anchor the stump. At one stump, I could only get the post down about a foot and hit rock. when we got water it floated. I had to anchor it so it wouldn't float around and sink somewhere I didn't want it. Took a couple months before it finally soaked up enough water and sank.

Your pond's gonna look great when it fills!