Hi Rick
My Yorkshireman has a bow thruster fitted, mine is the Robbe type, 380 motor 6 volt. I think a better one is the Raboesh?? make, come in different outlet sizes. My motors are on 12 volt so a seond 6v battery is fitted with a third ESC, the manuvering is superb with the bow thruster, but is very good with just the main motors, worth fitting if just for show at the lakeside.
Hope this helps
Mark