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. This is an ideal first plank-on-frame kit that is designed for the first time builder. if you are interested in small boat construction, this model is built the same.