Here's a quick pictorial explaining my process for finishing and filtering.
We tap 100-200 trees and make 100-150l of syrup each season. We boil on a 20"x64" evaporator, and average 12-16GPH. We tend to boil 100 - 150 gallons at a time, which results in ~15l of syrup for the day.
We like to take our syrup off the evaporator a little thick (68+ Brix) and draw off into a stainless pail. We do not filter during drawoff. At the end of each day, we pour the drawoff pail into a 20l stainless pot, leaving behind any sludge that has settled out.