...my shoulder. The brake cable is routed under there. I tried it with no luggage and the pain was unbearable!
...and if you manage to get a cable guide, the pain is even beyond that! Never to be risked again, that's for sure.
Richie, have you thought about lifting the bike by a rear rack crossmember? When I ran a Surly Nice Rack (Rear), the closed "return" at the front did yeoman service as a lift point. I checked all the forces, and on that rack, it did no harm. The Thorn rear rack doesn't lend itself to such use quite so well. Does the rack-pack secure to the rack with buckles and webbing? Mine uses velcro, and if I tried lifting by it -- "Riiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiip! Plop! Oh.
Here are some possibilities, as well:
Etsy Bike Portage Strap
http://www.etsy.com/listing/57492833/bike-portage-strapThese used to be common -- frame-corner bags as shoulder-carry pads:
http://www.youtube.com/watch?v=Gg63jqYqNMgJandD make one currently available here, the aptly named "Sling and Pack":
http://www.jandd.com/detail.asp?PRODUCT_ID=FSNP Methinks
all trains should have ramps and the world should be cycle-centric, but I'm a voice in the wilderness on this one.
All the best,
Dan.