We are adding a Fuel Management function to our PaperlessFBO System and we assume most fuel farms support Jet A and 100LL.  We'd like to get an idea how many out there also support other grades.  We are intially supporting 5 tanks, each of which can be a different customizable grade, so we wanted to get opinions on whether 5 customizable tanks are enough.  Please share you opinion.  Thank you.