First, after looking at some pictures, I'm not entirely positive that the Grady rear corner rodholders on the 265 are 30s. I think they might be straight back 15s. The Grady forward rodholders are 15s angled out 45. Those are the only four that I did not install myself. I guess that it all really depends on the boat and room in the gunnel. I was thinking of other boats that had 30s straight back in the corner.
The galvanic isolator under the stb side gunnel probably prevents using a 30.
The thing about the angles is important because you want the tips setup so that when you get a fish on, the line doesn't hit the rod aft of it.
A lot of that doesn't matter to the downrigger salmon guys. I think you need to find the right combination of outrodders to put in the grady rodholders.
I installed a 30 deg on each side, angled 90 outward. There is a spot forward where the gunnel widens enough to use a 30 deg angled out.
I also installed a 0 deg Heavy duty swivel on port side between the grady rodholders. I have another one for the stb side but I have to move the galvanic isolator.
I have 0 deg across the tailgate and replaced the cupholders with rodholder/cupholders.
(the super wide angle GoPro messes with the angles in this picture)