30 years away from home is enough
I am moving back home to Spokane in the next two months and bringing my tools and airhead menagerie with me including my own '77 R75/7 so you will have a bike to compare yours to.
I also have an '81 g/s in pieces, a '75 R90/6, a '56 R50, and an '82 R100RT just to keep me occupied. There's apparently a small but dedicated airhead community in Spokane--and I am accustomed to running two tech days per year so you'll have some human and tool resources.
If you like engine work, I will also be building a high performance airhead engine over the next few years just for grins. I have three+ /5 engines to cannibalize.
I look forward to seeing your new /7. You made a good deal.