I own a 18' starcraft aluminum boat. I have 2 short arm cannon downriggers 1 on each side of the boat toward the back. I bought 2 long arm big john downriggers and was wondering if anybody can give me some suggestions on where to mount these extra 2 downriggers. I would love to mount these straight out the back on each side but in this case the end of the rigger will be right in line with the motor. Will this be a problem with the cables hitting the prop or will I be ok? The other option might be on the sides with the short arm riggers. Any help would be appreciated. Thank you!