Hey Paul,
I initially tried using a section of bicycle cabling (main reason it took 4 hours the first time). The issue with doing that type of install has to do with a mount for the cable housing ends. On a bike, the cable is held straight by bracketing. Unless you fabricated something, the bicycle cable twists to one side and kinks, preventing the internal cable from contracting properly. I played with this for some time trying to get it to work, and finally gave up. I did not use the hook, but rather looped the cable around the notch and crimped using the split nut and washer as supplied. Early on, the cable came off once, but an adjustment has prevented it from coming off since.
-- John