Nice guide but I noticed you said to use iso alcohol, you may not have a problem with n64 plastic but I'd advise people to use something less harsh to clean the goo gone grease off like soap and water on a cloth instead because alcohol can cause noticeable damage to many plastics. 
Rubbing aclohol is NOT petroleum based and it has just about zero ability to break down plastics. Rubbing alcohol is about the safest solvent you can use on plastics.
If I remember correctly I used some iso 90 on a super advantage joystick back in the day with a cotton ball to get some sticker gunk off then I gave the whole top a rub down and ended up with yellow streaks all over.
Also I was getting some gunk off a piece of my car dash a few years back and ended up with some hazy streaks luckily I only did a small section; to me it looked similar to genesis black plastic.
Personally I would use goo gone and or soap first before I try alcohol.
I have used alcohol on lots of things without any problems though
