Other than "how much does it cost?" and "how long will it take?", most questions we receive concern wood and plywood. we will be adding the. Our boat trailer plans feature the most modern, up-to-date, and technologically advanced features available to give you a boat trailer that’s equal or superior. Didi mg30 built by tamas csaba in hungary . our stock design file . click on design links below to see more info. go to pricelist for plans & study packs.