Only tools you need is a drill and hole saw set and jig saw. They are fairly standard tools. Some say you need a chassis or conduit punch but it's not the case
Do yourself a favor and get one from auberins. And you need a 40 amp. They cost a little more but it will save you a headache. My motto is you get what you pay for. Cheers
I did not look at the schematic I just seen this on YouTube the other day. Suggestion was made to give him some ideas. It's great hat you picked up on that. That's what makes this forum.