I used the flat sticky mount. It is so strong that it is still on the car even though I sold the camera. Good thing is it's impossible to spot unless you know where to look.
The recaros have yellow bits in them whether you spec the pack or not. Not sure on the normal seats.
I do have yellow pack on mine and love yellow seatbelts against RB. Even Warren/Brown Bear (whatever his username is lol) said it looks good with RB.
I prefer the feel on open face but have a full face as I need it for open cars.
Currently have a Arai GP5W with Hans for racing but looking at a new Arai soon so might be for sale. ;) Otherwise I don't think the V2 is too bad for the price.
I think £13k at 12 months would be about right. Maybe a little more.
Mine was £15700 with £1.5k deposit and it is at £12.3k at 12 months. Shame you don't want RB.;)