I've done multiple 1,000 miles + tours fully loaded and whenever I do it again it will be on the same bike. A long wheel base above seat steering vision r40. The only thing I might consider is adding a fairing. Fwiw my riding partner has done many of the same trips with me on the same model bike though in the short wheel base config and he's happy with it.
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Jack Taylor Super Tourer Tandem (FOR SALE),
Jack Taylor Tour of Britain, Px-10, Carlton Flyer,
Fuji The Finest,
Salsa Fargo, Santa Cruz Tallboy, Carver All-Road
.