It sounds like you're getting started with a new project - milling a log into planks! That can be a fun but challenging process, especially if the tree is large or has irregularities in its trunk.

Sweet chestnut trees are known for their beautiful wood, though. The grain pattern and color should make for some stunning planks once you've milled them. Did you have to hire someone with more experience or use a different method (like a portable sawmill) to cut down the tree last year?