It's all about focus. Even when you are in the shop late at night and alone. Especially when we get older, like you said Cab- . Shoot at my age I forget to write it down. I've learned, finish the job at hand before going on to something else. Then double check everything before moving on. I'm 76 now and have learned you have to treat old age as entertaining. And every mistake as a learning experience. Don't know how much longer it will last, but as of now it's still fun. And I'm blessed with good health. Yes God is great !