I am hoping to make a wooden barrel type butter churn as per attached photos. Looking for any advice as how to go about making one. ie, type of wood most suitable ( this one is made of oak but is full of woodworm ), how to shape each section of the barrel ( do I shape each part with a shaped drawknife ). Is a sealant used between the component parts or does the wood naturally swell when being used to make butter. Any advice gratefully received.