Typically - people convert Trainers to tail draggers. Most warbirds and 3D airplanes are tail draggers. If a trainer is a 'stepping-stone' then it should seem logical to try and step up to a taildragger by converting your trainer to a taildragger, before stepping in to a warbird that has flight characteristics that a beginner may not be ready for. That's why I wanted to do it...but opted to buy a H9 Piper Cub.