I, too, have spent time in the stables with OPC. However, I was not asked to change anything that was working (why would I?), but to fix something that was broken. Anyone who has done this knows the pain and suffering that goes along with reading another person's mind.
You have to know when to shrug your shoulders, heave a heavy sigh and get on with the work. Sometimes your hand has to fit the shovel

*OPC - Other People's Code