Ok, I need swivel rod holders for my Parker 2520. The boat currently has 4 "Parker" gunnel rod holders that I think are about 15 degrees. My plan is to remove the 2 near the stern and relocate them midship. In there place, I want to install swivel ones for tuna & shark (total of 6). Seeing that the swivels will be the closest to the stern, they have to serve many functions. I will troll from those, chunk bait from those, even flounder fish. What degree holder should I get ? My "big gear" includes 80 and 130 class with bent butt and also many 50 class with straight butt. Thanks for the help !!!