Getting ready to shape: Fin question

Ok guys so I haven’t posted in a while but i ma getting ready to shape my first board. Question is, whether or not to install a tri, quad or 5 fin boxes so I can have both. I will be using Probox Fin Systems and shaping a 5’6" 20" 2 3/4" CI Biscuit type shape. Keep in mind this my first board and don’t want to make things extremely hard. Also, I am a little unclear of the advantages of a quad over a tri. Thanks a lot for the help!

snap 10, When you are unsure Tri Or Quad do both. Here’s a 6ft. Terry Martin 5 fin set-up. Thanks for making ProBox your system of choice. Welcome to the ProBox movement. Mahalo,Larry