i'm not sure when that started but I think the online thing using VIN started some time after the 2014 models
You can always call Thor's customer service with your VIN. They can send you the drawings.
It's been some time since I did it, but they tended to want to only send the specific drawings that I was asking for...nothing more. But push for everything.
None of them are very good, pretty poor really, but they are at least marginally helpful and have come in handy over the years. I got the electrical drawings, the plumbing drawings, and all the frame drawings
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