thanks for the feedback! Noteon, I think I have seen some pictures you posted with the Bug on your crossrack--it sure is big!!
I think I am going to give the posthaste a try, and then if I need a bit more capacity look at the crossrack for the front with a lighter load. I haven't actually started doing this commute yet so not sure how much space I will need. I will report back on the posthaste rack once I have it fitted up.