Luther's welding in Bristol Rhode Island made replacement tanks for an MS400 back in 2017. It's a single tank with 144 gallon capacity and overall length of 114". Trying to find owner of the boat for which these tanks were made. Please contact me if you happen to be on the forum as I'd like to find out about the install. My initial measurements showed that I could not get this tank into the engine room so just looking for information on your install.