Apologies for bringing back a thread from the dead! I'm in the position of wanting to add some additional gunnel mounted holders on my 330 express. Currently, it has the 4 which are stock. Seems the two common options are adding a holder between the two existing ones, or one way aft. In a perfect world, I'd just add a pair of 0 degree swivel holders aft. However, my concern is trolling and that rod being in the way of the existing aft holder. The two stock aft holders are not offset, so the line comes straight off the boat.
Adding one between the existing could be done, but it would need to be a 15 degree holder angled halfway between the two existing.
Any experiences on either approach - again, given the biggest concern is keeping the lines clear of one another after a hookup. FWIW, for trolling, the aft holder would be for the flatlines in tight, and the other two would be for the long and short riggers on each side. I'd like to avoid needing a pair of short bent butts if possible, as I think that might help the issue of clearance, but adds other complexity.
I want to future proof myself for taking on larger tuna off Chatham when I get talked into it, hence the desire for a swivel. It would also be likely to be used in canyons for swordfish as well.
I'm not worried about the mechanics of drilling/installation, as I've done it on other boats.