call dynatec at 1800-928-3962.by the way tell them there is a lot of interest for a rev-box for the fourman 500. I called last week spoke to a nice gentleman, said there was talk floating around but nothing on paper yet. he said call back in 6 mo. I think the more inquiries they get about a particular application the more it spurs them, seeing that there is a real demand for a product, which means $ in sales.
pipestone