that ormsby is a very big tug take a look at ,alcubar,nangee,or a bit bigger afon alaw,portgarth,dutch courage ,smit polen there are lots my personal fav combo is twin 60mm or 70mm props on stearable korts working winch maybe bow thruster my advice to you ad is come along to the next tug towing event and try as many tugs you can we all will be only too glad to help that applies to anyone that fancies a go just come see me i will get the ball rolling .