I have some pretty strong opinions on this subject I guess, and personally I never had much luck when I went through the phase of trying to rig up trailer hooks on all of my big rubber trouts. Maybe I didn't put enough effort into the Castaic trout so I gave up on it too early.
Maybe rather than me bitching about it, we should change this into a discussion of how to rig a trailer on the Castaic trout. I know you had a way that seemed to be working Nicolo, and Ryan had a setup that was working for him too. I have no doubt that if you threw it long enough you could probably draw some big strikes on the 12" Castaic trout. To me it's just a question of how do you hook those bites?
Here is that thread when we talked about this before http://www.calfishing.com/dcforum/DCForumID2/52.html