Man ...... I spent loads of money "upgrading"  Cheaper hulls . And to be honest it was fun ..... But ....... For what you end up spending on a boat that will never be as fast or controlable  as a boat specifically designed for speed it doesn't work out . I have a "few" plastic Aquacraft boats that i have installed brushless power and new drivetrain in and on . I have to say including what you spend on the original model then the upgrades it's way too much .