That's just great...
Myself, I am a gear junkie and love shiny, new inventions. At the same time extremely conservative about changing even the tiniest detail of tried and true concepts. So, my first gut reactions may have been a bit to harsh.... I love the way you think out of the box with this rollerpack.
Two questions:
1) I am guestimating the rollerpack has about the same offroad capabilities and limitations as a bike. True or false?
2) Any real life experience with the ski kit used with snow shoes or skis?