Quick question that some past experiences will tell me quicker than research and calculations. What is the max batch size of a typical gravity beer (1.054) that I could do in a 58 litre mash tun? It is actually about 61 litres but at the bottom of the return fitting is 58 litres. Do you think I could do 70-75 litres if I had a 100 to 120 litre HLT and BK