I'm worried about the electrolosis potential of putting in copper elbows in my FWC system. I'm going to mount my heat ex. to the transom but to make all the extra lines work, I'll have to put in probably 5 elbows and two 'T' or 'Y' fittings. I had two copper elbows in the last set-up with no apparent problems but if I add another 5 fittings, will I have any problems?