Interesting talk about a chainsaw being such a Modern Marvel........
My great-grandfather (born in 1884) would drag logs out of the woods with mules,
split the logs length-wise down the entire length of the 8-10 foot log, and then cut them into firewood lengths on a ~4 foot diameter blade saw-buck.
Oh, and the sawbuck was run by a belt connected to the spinning rear wheel of a Model T! Take THAT OSHA!!!
Com: Chainsaw Oleomac : Trees felled in the winter have most of the sap below ground. It saves your chain/bar from getting junked with sap.
IF possible - fell the tree in cold weather.
Then mill when warm. :-) I love that you include things like the oversight and having to change the chain.
It's an important part of any new process that everyone should know.