For me, the center rigger will help a ton, I typically troll an 8 rod spread, I'd go 9 but no room for more rods unless I add rod holders and honestly there is not enough room to add them and make them useful. I like to troll one WWB off the rigger, and one closer down the middle about even with the bars off my outriggers. A lot of big fish were taken down the middle this year on rainbow green machines or mini mamba bars in that location. I like to take the stress off my rod tips when possible so my gear lasts longer, and I get less wear on my line. I also perfer to get my center lines as high as possible, getting them higher then a rod tip would be helps a lot, for pulling bars or birds you do want them to troll properly and not be dipping in, now I can set my lures back further and still get the proper action. If you have the rod space, double rigging is the way to go, it allows you to get a lure or bar down the middle of the spread where many guys leave a gap, or they place the lure there and skip having one way way back. On every boat I've fished, we've always been more productive no matter how good or bad the bite on a boat rigged with a center rigger, it maes the spread that much more effective.
That was the last of my projects for the spring. Boat goes in Wed morning so now it is time to go use it and enjoy it. Already planning a few more upgrades for next season, but not as extensive of a list.