I used this for fuses. https://www.aircraftspruce.ca/pages/...userelay-1.php
Sorry I just realized hats the Canadian site. Tha unit is very high quality. I love it. I have it mounted under the panel face down on the passenger side. It’s easy to get at the fuses and keeps the panel clean. Much cheaper than CBs. I’m sure others will have opinions but this one I’m very happy with.
I bought all my switches off amazon. 25amp DC switches. Covers everything I need. Edit(I had to buy a couple switches from kitfox to match my round rockers and have dpdt switches)
I also felt it was daunting at the start but one piece at a time and it becomes fun. This probably ended up being my favourite part of the build.
Edit: if you feel the aero electric connection is too much to read start to front, just read the chapters that cover the things you are thinking about. Before you know it, the entire book is read.