Does anyone know of a quick and efficient way to build or roll your on body tubes for constructing engine mounts? I seem to recall reading or hearing somewhere that you can build an engine mount tube by rolling paper or cardboard around an engine casing (18mm, 24mm, etc. depending on what size you want). I recently bought an Estes Outlander kit and want to upgrade it from 18mm to 24mm . I've heard from other rocketeers that the Outlander is dangerously underpowered if flown in stock form on 18mm engines.