There are many repairs that are fast, cheap and easy the second time you do them. The overhead panel in a particular brand of combine is a good example.
Some farmers have one tool worth more than their grandfather’s entire tool inventory. Modern equipment is so big, it takes expensive tools to do even simple maintenance and repairs.
I confess that, years ago, I didn’t pay much attention to closing wheels on planters. Since then I’ve learned both the importance of properly adjusted closing wheels, and how to do it.