Would You Have Overlooked This? Fixing my Atwood RV Heater

All of my propane appliances on my Lance 835 truck camper worked except the heater. May have not taken the best troubleshoot route but here ya go. Wanted to knock my head against a wall by the end of this diag.
NOTE: I failed to mention in the video, I did turn the regulator adjustment back to where it originally was. However I ended up replacing the entire regulator assembly due to the seepage from the switching valve weep hole. `

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