If yall want to see how this business of needing a "dealer only" service for the electronics ends for us...?
Then take a look at the John Deere mess.
https://www.wired.com/story/john-deere-farmers-right-to-repair/
Can't wait to see a "check engine" light on the hand held oh-pee-ee.
You pull the recoil and just see an LED blink and fade instead of the unit cranking.
When the start counter or run time counter reaches a set point, you get to go see that dealer (same one that doesn't want to buy the diagnostic tool) and have an inspection for exhaust systems alterations, deleted catalysts, Perhaps the fuel flow mapping compensation is shifting outside of certain, factory, perimeters? (ported saw).
...after unit passes inspection, then they can reset your ECU.