In 2011 I purchased an American built 5th wheel. In order to comply with European legislation it had to be fitted with a mechanically operated handbrake (parking brake). As far as I know Dexter provided the parts (4x drum back plates, cables and ratchet lever. Parts shipping and fitting cost about £650.
Once fitted it must be capable of holding the detached trailer on a 16% hill, more than enough to hold the trailer steady when unhitching.
This system does not detract from the electric brakes already in use.
Just a thought
