Hull 598. is available with or without a tunnel for ob jet. weight in table above is the weight of the uncut aluminum sheet and plate. max hp (remote steering): 180. Boat building cutting files kits boat building plans designs custom boat plans kits steel aluminum power boats sailboats trawlers part built boats or complete boats. This page provides a list of our currently available boat plans, a link to the web page for each design, and a price for each design. incomplete or ‘semi-stock.