This may not be possible for you but... There's an exceptional diagnostic technician about 300 mi from you in Avoca. His YT channel is South Main Auto. He does some impressive troubleshooting on difficult issues, very technically competent. If I were in your shoes I would consider making the trek. I've burned many hours watching him solve oddball problems that other shops are unable to. In one of his videos he troubleshoots a P0303 on a 2017 Wrangler.
