Ok I read the How to section and i've decided to install a kill switch on my fuel pump..like the one in the section. I Just bought all the materials but i have a couple of questions before i start. First I got a 20amp rocker switch...is that big enough or should i go with a bigger amp one. 2nd would it be a good idea to instal a fuse holder in case of failure or is it unnecessary. any help would be appreciated