I'm slowly getting this bundle of stuff installed and am wondering about the transducers. Thinking of installing the large SS transducer outboard of the high speed skimmer is that good or bad? How close should they be from each other? The book says about 12" is it better to have them closer or try to keep them about 10" since I have a star board mount plate that is 12". It looks like the lower unit will block some of the signal from the long SS transducer, are you guys having any issues with that?