I'm planning on buying a Chameleon insert for my bags. I know it would fit in my Carly and other bags but I need to know if it fits in the Med. Ergo hobo. So does anyone in here have a Chameleon insert in their medium ergo hobos? What size do you suggest for that bag? Do you think the Medium extra sturdy would fit in there? Also if you have the small chameleon insert does it keep its shape and kind of stiff? Or does the small collapse a bit? Any info would be helpful!!! TIA...I need one really bad. I hate digging for stuff.