I have pretty much narrowed down my new bag to the Briggs and Riley hard sided sympatico or the the soft side zdx I am wondering what people’s thought are one the CX™ expansion system in the sympatico ? Is it useful or just a gimmick The system doesn’t seem to be as strong when “expanded” I know that the idea is that you fill it and compress it occasionally I need to expand and check the bag will the CX ratcheting mechanism hold or is it meant to be closed after packing