so i have made up my mind to put side bunks on. I am going to build them my self. My question is how long should i make them? i have seen comerical one is both 2 ft and 5 ft. then i seen a set that was lit maybe 6in wide. my boat is only 17 foot long but i feel that they would realy help me out with my launch and retrieve as i am new to the game. any information here is greatly appreciated and many thanks