Presentations Welcome to the Presentations page! This page contains presentations given at the National HDT Rally by Jack Mayer and Marc Jones. The presentations can be downloaded for future reading, if desired. Quick Menu:Building a Bargain HDT 2021HDT Overview 2021RVH Hauler Body Design 2021 View Building a Bargain HDT 2021 View HDT Overview 2021 View RVH Hauler Body Design 2021