[Dick Linn]

One thing we found useful over the years was to have a maintenance and inspection checklist that was followed immediately after every match. Besides the obvious (swap for a fully charged battery ...) it included visual checks for loose or bent components, chain tension/lubrication, alignment and so forth. Sometimes that can prevent problems or give you more time to deal with them before they become critical.

As for replacing parts, we gradually learned to design and build with accessibility in mind from the start. That comes with experience.