As someone once said to me, on observing the 'features' of my 4/4, including all the rattles, squeaks, jarring suspension, leaks, ill-fitting components, and hand-built idiosyncrasies:

"Well, what did you expect, it is a Morgan".

That said, this episode sounds particularly disappointing.
Limited volumes should not mean limited development.

As a 'traditional' Morgan, why is the ARP4 handbrake much worse than its siblings? Is the design so different?