Video of Life Trac 6 – Designed By OSE (Open Source Ecology). The England Castle (Baker) Open Source ‘MyCat’ – Multi Capable Agricultural Tractor is an intended rebuild of OSE Lifetrac 6. The ‘MyCat’ will have additional, visionary design features from England Castle (Baker). Upon start of production, the designs will be released for free under the open source banner of England Castle – Open Moo.