I have started to plan my next build, a Farm Boy hit’n miss engine. Plans are purchased and the serial number is 651. Looks like a fun machine to build. Lot of machining. I am wondering about how to source the material for the flywheels. They are some substantial chunks of iron. 1x6” blanks are needed. Cutting these out of a plate is an industrial sized task. I have tried to come up with an idea to use something easier to get, like a weight or even a car fly wheel. However, most such things have a large hole in the middle. Would appreciate some inputs on this.