How strong are the optional hanging cabinets?

[mjlaupp]

In addition, The shells will not fold down when the cabinet is hanging in place.

After two years and umpteen trips I finally forgot to remove the over sink cabinet when closing up the TM. When it wouldn't close I looked up inside from the rear over the bed and discovered the cabinet now sitting on the countertop next to the sink. When I had attempted to close the rear shell, the cabinet was positioned on the countertop and came off of the mounting bracket. So, I opened the door up climbed in and after inspecing the cabinet for any damage placed it on the floor where it belongs. No damage. Every so often I have a lapse and forget something that I never have forgotten before but it has never been a trip stopper, just a minor delay. We love our TM!
Dan