I know this is an old thread, but some feedback from someone with this product would be nice. I see that you recently sold your PackJack (too bad I didn't see that post last month). Did you get a new bike with a rear stand or something? Or were you unhappy with the PackJack?
How sturdy is it on different surfaces (packed dirt, gravel, pavement)? Is it sturdy enough to remove a wheel if necessary? How much larger is the adjustable model when it is folded up than the non-adjustable spool stand model (if you know)?