Well, kudos to you for doing three hours on a Royal Enfield!
I actually like those beasts and have a few back-road miles on a new Cafe model. That said, cannot imagine that long a ride without a long walk every hour or so. As I suspect you already know by now, your V7 is a way more comfortable steed, though it, too, is not the premier slab machine. But it sure shines on the back roads ... and you don't need to plan ahead to assault a hill as at least I needed with the RE I rode.
Not sure if you are a longtime resident of D.C. and know the area well, but my part of the world -- the Real Northern Virginia
-- has stupendous roads that are in relatively easy reach for you.
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Aside from the obvious terrain features on the map that make for grand riding, here's a video example of a road that starts 1/2 mile from my driveway:
So, Maggiore, if you don't already know some or many of those, come out to Cross Junction some time (uhm ... let's wait 'til spring for the ride, tho wrenching and benchracing are year-long activities at the Moto Grappa.
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Best,
Bill