True professional. Been pulling live bottoms for years now but to spread like that with a box definitely takes skill.Nice job mate. I've never been good at spread dumping but I pull tanker for the most of the time. I'll have to say you guy are great with those dog trailers. Cheers keep the tyres rolling.Have you ever heard of installing chains to the tailgate they make them for spreading in Canada for building roadways then you can set them to different lengths too adjust product coming out hammer down chains do all the work.