My son who is anti-mod, built a massive, magnificent castle, mostly out of stone. He complained quite a bit how hard it was to fit certain pieces to others. I built all the outbuildings and most of our portal outposts. After he quit playing, I downloaded Valheim Plus for its Advanced Building Mode, which allows me to rotate any building piece on both the Y & X axis, and its Advanced Editing Mode, which allows me to fix certain pieces that never seemed to click together quite right, and reposition stone blocks on dilapidated wilderness towers, which have many stones no longer in their original positions. I love this mod, because I love building, and repairing wilderness structures, but it is possible to build, on close to the same level without it.

https://steamcommunity.com/sharedfiles/filedetails/?id=2781175473