Hi, we have a T6 shuttle, with a Hilo roof aswell as an Ovano draw / bed system installed, the vechile is mainly used for short weekend escapes. We have been using a large 15lt jerry can for water, this is a pain !. We are looking to install an under slung water tank & pump with exterior fill and tap. Any opinions on this type of install and any reccomned installers in the South East, please ? cheers