It has been a long journey but I think I am nearing the end. I have secured a 500 gallon propane tank thanks to a huge favor by someone in the propane industry. Very nice tank. So I now have a 500 gallon tank and a 250 gallon tank. I have a guy ready to do my welding. He is going to make the saddles and we are going to put the 250 on top. Can someone please tell me what he will need to do to connect these tanks and get me set up so they are ready for the plumber?