I am thinking of upgrading my holding tank monitor to a Seelevel 2 monitor. Has anyone done this on a reflection. Does anyone know how tall ( in inches ) the holding tanks are on a 2016 Reflection 303 Rls. This monitor has external sensors and good reviews on the web. The monitor that came with my Reflection is very unstable. Sometimes I get a reading and sometimes I have to play with the monitor. I figure it probably is best to upgrade to a more reliable monitor than sink money into parts for this monitor. Any help or thoughts are appreciated.