I automate AutoCAD drafting work. I like to work with products that are more-or-less standard, but that are also customized for each project. Such products are a perfect fit for my AutoLISP skills. I've automated the detailing of anaerobic digesters, of metal building anchor bolt plans, metal building roof framing plans, walls and roofs for large air-handling units, fan assemblies for air-handling units, and ornamental rail & gates.