They had it all at the Senior Project Showcase at Cape Cod Regional Technical High School in Harwich on Wednesday.???Students get to show everyone what they have done for the last year,??? said Nancy Knight, senior project coordinator.Eighty-four seniors participated, she said.Jameson Gauvin, from Yarmouth, said his project, a 10-foot-long aluminum skiff, was a labor of love.???I wanted to build a b