Hardly an unusual post this is. I had exactly the same problem with Harry at various stages, he's now 16 months and I reckon hes 80-85% there, but some people comment on how good he is at recall, but I guess I am a hard task master. I've seen cockers at 100% recall and believe me its impressive.
When Harry was at his most disruptive, I used a long piece of cord, tied to his collar, much better than a training line imo, and that worked a treat. If he didn't want to come i'd merely stand on it. With a training line Cockers soon learn that they're on one and hey presto you think they're coming back.
Tell me, would you use your cord attached to the collar to stop a dog running away?
What difference is a cord to a light webbing line? Why better? Did you try a line?
Maybe I'm missing something here?
Personally wouldn't be happy at an 85% recall but then I am a professional dog trainer.
And yes it is impressive to have a 100% recall certainly is with my dogs anyway
I'll try and answer you questions chronologically.
1:I used cord, as the training line wasn't working, Harry soon learned that he was on a training line, where as the cord being a lot lighter and trailed on the ground Harry didn't realise so when he wouldn't recall I could easily stand on it. Also I never said I used cord to stop my/a dog running away.
2:I have absolutely no idea what the difference is between a cord and "a light webbing line" maybe you can enlighten me?
3: See number 1.
4:See number 1.
5: I certainly think so.
I never said I was happy at 85% recall, I merely said other people whilst walking commented on how good Harry's recall was. But then again, I am not "a professional"