a small bag to check in items you can't carry onboard?
have you tried checking in a really small bag that held just the items that you cannot carry onboard, and did it arrive at your destination.
i choose to leave items such as a multi-tool, blades for a safety razor, and other such items which can be checked in but not carried onboard behind to avoid having to check bags in.
but these items could easily be placed into accessory bags such as the kit. the question is whether a small bag such as this would make it to your destination.
have you tried checking in a fairly small bag, and has it arrived safely at your destination?