I need certain tools to do my job, but my boss want's me to use bovine manure tools that don't work well. I.e. it will take huge amounts (weeks) of both my and my teams time. While the right tools will cost a few hundred dollars and will be working within a week. I've had this problem before with other bosses. All my bosses have been intelligent, and are normally reasonable. But once they have an idea in their head, they are won't to let it go. Once I finally convince them to do it the right way, they get upset/resentful that they were wrong. How do you guys tells your bosses "Bugger off and give me money to get my fertilizer done?" in a professional way without them getting all mopey?