while "picking on"

the setup. ( its a good one generally... He's probably not having problems with it)
The steel cable being threaded through a nylon control horn... probably not the best idea. The wire will eventually wear through the nylon. (another thing to inspect regularly)
When I do pull-pull... I use a 2-56 0r 4-40 clevice with a eye-bolt on the end of the cable. This puts a clevice pin in the control horn, and they tend to not wear out either the pin or the control horn. That allows some fine adjustment of the cable length too. [8D] It is a bit of added expense... and added weight... and might not look as pretty for scale effects...
He was probably after a more scale appearance in this case... and thus I bet he's aware of the added inspection requirements for his setup.