Simon, I also use the transducer on the rudder of my P15 without issue. I use a single stainless bolt to hold it and when not in use there is a small hole in the rudder which hasn't affected performance.
By far the bulk my fish I used to get from Cowan was by working the between the second and third step of the shoreline drop offs as there was plenty of water depth here and some structure. I used to just slowly troll deep running livies or rigged fresh squid in these areas. I have known people to get good jews in the middle but as you said it is featureless and it seems to me that the larger predators in that system just slowly fin around looking for a feed as they cannot use the current to hunt via ambush like they do in the mainstream Hawkesbury. How did Dave loose his rod?
Catch ya Scott
By far the bulk my fish I used to get from Cowan was by working the between the second and third step of the shoreline drop offs as there was plenty of water depth here and some structure. I used to just slowly troll deep running livies or rigged fresh squid in these areas. I have known people to get good jews in the middle but as you said it is featureless and it seems to me that the larger predators in that system just slowly fin around looking for a feed as they cannot use the current to hunt via ambush like they do in the mainstream Hawkesbury. How did Dave loose his rod?
Catch ya Scott