Took some pics during the 800 mile ride this weekend into the hill country of Texas. I'll post some more up as they trickle in from the others that were there.
They had about fifteen different Vincents there. BSA's, Triumphs, and Indians mainly, but a few other odd balls as well. If you are ever near San Antonio Texas, it's worth a drive out to see it.
it certainly looks to be set very far back. Not only the mounts to the box but possibly also the triumph rack mounts could be getting a lot of extra stress.