hand guards and heated grips

[17-CB-002]

I'm planning on getting a set of hand guards and heated grips installed some time before the end of October, and I wanted to a little insight from those of you that have been using them for a while:

Regarding the heated grips themselves, Honda OEM or aftermarket? which is more popular? My gut tells me Honda OEM.

Regarding the Hand guards: I currently have a Dart Marlin Screen (Smoke) and I want to keep up with that same "blacked out" look, so if i get hand guards that are clear, i'd prefer if they were also heavily tinted. The only one I've seen like that in my limited research is the Chicdesign model (https://www.samurider.com/?p=17262). Are there any alternatives? It's worth pointing out that i'm also not completely sold on them being transparent either. If there are any solid black ones i'd take a look at those too.

What are some common things i could accidently permanently ruin due to inexperience while installing heated grips?

Will the handguard from an AfricaTwin fit?
GO since you had both bikes, will it fit?
Last week during the bike ride, I saw the handguard on the AfricaTwin and closely looked at it - it seemed that it can fit the CB.
Regards
Alain