I did this using two bags. I`we got an older dahon 16" folder. A bit bulky and heavy and I needed a bag. Used two bags and joined them together using two long zip`s.
Imagine one bag is the "bottom", used just like the one on the platform. Then put the other one on top, upside down as a lid or a hat. To keep it in place, and to be able to lock it i joined it together using two long zips. Guess you could use welcro too, but i like zips.
2-3 times I went to the IKEA warehouse, did my shopping, left my car on the free parking, took my folder in the bag onto the free IKEA bus ("no bikes" sign by the door) going to the town center.
Then going back the same way. Do`nt tell anyone!
My bag is a bit bigger than you need, but since the thing is heavy it is nice to have some extra room, = less handeling when bagging. Also my folder easely falls over, and then can roll out of the bag. Done my way it is always covered. Also nobody can see innside. Can be good sometimes if there is strict rules (like the IKEA) bus
Last edited by badmother; 05-29-08 at 03:09 AM.