I agree the granni pot is small and hard to rinse 20lt drums that have the cap on a corner. I have seen a crop lands poly 50lt one retro fitted to the same spot but I am going to persist with my 4940s pot.Test drove one today and was impressed with the screen running both rate and auto steer. The smalll granni pot seems strange. Can you fit an after market bigger one.? What is the fuel useage