Deuter Cross Air 20 Backpack
Osprey syncro 10 (or 15)
Deuter Race exp air
They are all under 20L and come with that mash/frame, which I love. But, I also travel a lot and would want to pack the backpack small and put in my other bag, take out on smaller walks. To do that, I'll need to take out the frame. I've done it before on some other bags, but lately noticed that the new bags are a little more tricky. Nobody at the stores (I went to about 10) knows anything about it.
So, I was hoping that some of you have done this before. Or, can give me some feedback on whether or not this can/should be done.
example

Thanks!