Yep, and operating machine tools when you're on your own is potentially dangerous as there is nobody to come to the rescue in the event of an accident.
When I do so I am constantly running a little mantra in my head which says "take your time and double-think everything before switching on".
Solo machining simply wouldn't be allowed in a regular engineering shop.
Its easy to let familiarity breed complacency, as was the case with my boring tool.
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