Do you have any pics or details on the trailer you are modifying with the side-dump? I have been thinking about this for the past 4 yrs trying to decide exactly what I want to do. I have some friends in Madison, so I get over that way a couple times each year.Snake river trailers and debris systems also have them. I couldn't find one anywhere close to me or what I wanted, so I'm actually in the middle of building a side dump box for the front of my 16' railer, MUCH cheaper than what those guys want for a trailer. Cheapest I found was almost $6000, mine, including the cost of a new trailer will be about $3600. I'll make you one if you want!