Sometime around 1968 I found a small set of drawings, about A4 size, for Sct. Knud in (I think) Ships Monthly. So I enlarged to 1:32 scale and made my model plank-on-frame with GRP overcoat. She is powered by a 6V Pittman motor driving a self-made scale prop and 2:1 gearbox. Steering is effected via chain and quadrant as per prototype! Everything bar the anchor, anchor chains and steering chains is self-made using a variety of materials (brass, plastics, 'Perspex', and copper electro-deposited cowl vents). Recently I fitted her out with LED lights: interior, navigation and working. One might notice that I abhor a working boat looking like "Daddy's yacht" and so I apply custom dings, stains, oil spills, scratches, wear and tear to my tugboats 😀 My Knud runs as well today as she did 45 years ago and in all that time has only needed one repair to her gearbox!