My L1 is for sale.  I bought it new in Sept 2016.  Always used RO water with additive (Third Wave or Global Customized).  It’s in excellent condition.  Comes with tool that makes changing seals a breeze!  Also comes with set of new seals and group head gasket.  $1900. Located in Milwaukee, WI area.  Pictures on request.

Rob.  glpath@gmail.com