Had an off, some repair questions

[Badgerboy]

Hi, took the tank off to get it repainted (Decided to get everything re-sprayed) and typically I ended up pulling a majority of the bike to bits! Some extra questions popped up though, wonder if you kind chaps would furnish me with some answers!

1. Flap, snorkel, hinged contraption. When I took the airbox off, I could see the flap was half connected to some hooked fixing which was wedged against the rad. Looks to have always been this way! Haynes doesn't really explain the correct fitment, does anyone have some nice pictures?

2. Engine paint. Does anyone have the paint code for the engine? Crank cover took a bash and I'm prepping it for paint.

3. Sub airfilter - Noticed that my sub airfilter assembley is missing its filter. Should I fit one, or is this not a cause for concern?

Thanks.