I'd try something related to CNC manufacturing, but not necessarily what you have done thus far. For example, you could sell education on CNC manufacturing, sell CNC software, buy/sell/import/export CNC machines, install CNC machines, transport CNC machines, repair CNC machines, create/sell tools used in CNC manufacturing, design machine shops, invent a new type of CNC machine that is faster or more effective in terms of waste/energy, etc.
Somewhere there is an unmet need that you can fulfill at scale.
Somewhere there is an unmet need that you can fulfill at scale.