I do commercial refrigeration as well as heating and air conditioning and electrical service work.
I just completed work on this little 'Make table' they call it.
I spent over 10 hrs. on it, fixing a difficult problem, can't charge the guy that labor plus welding charges, refrigerant, dryer, and so on...sometimes you have to give the business owner a break.
Often they don't really appreciate it, but that goes with the type of work I do. When it goes back to him, it will be fixed right.
http://tinyurl.com/Ozzrefrigeration-work