Seelevel 700 series monitor from Garnet

I am new to the AS forums. My 99 Safari (which I have owned since new) fresh water qty. lights finally quit this season. Knowing all the problems with older monitoring systems & AS not having wiring prints for my year, I'm wondering if anyone has installed the Seelevel 700 series monitoring sys from Garnet on their trailer. I really like the simplicity of their system, but getting access to the tanks is my big Q to install the strips.
Thanks for any thoughts.