Keeping those things on hand
When I am going to be working on big jobs and do not have time to mess around with broken saws and machinery I go online and order my husqvarna chainsaw parts so that I have them on hand when something breaks. I am sure you can get things over nighters but I am impatient and want to get my job finished so that is how I handle it. One thing you can do is go online and find those who carry what you need or use and you will be ready when the time comes and something is malfunctioning.