Hello all! 
  
I picked up a manual 2011 370Z Roadster yesterday and absolutely love it so far! It's replaced a 2010 Focus ST which I adored and had some amazing drives in. It's taking a bit of time to get used to having less low down torque, but in the right gear the Z is mind blowing! 
  
I have a couple of questions I'm hoping someone can give me some guidance on: 
  
Handbrake - I've read these are utterly useless, mine doesn't seem too bad (it's currently parked on my sloped drive and not moving!) but yesterday when applying the handbrake, on 3 occasions the car would roll slightly back by an inch or two - it felt a bit like when you put an auto into park.  Is this normal? It was a bit concerning, particularly when I'd parked quite close to a fence! 
  
Should there be a sub in the boot? I was convinced I'd read the Bose system came with a sub where the spare wheel would be, but I just have a load of polystyrene packaging with nothing underneath as far as I can see. 
  
Is there anyway to get an iPhone 5 to play music through the audio system through Bluetooth? 
  
How should I wash the roof normally? I've ordered the Autoglym roof care kit, but for normal washes, do you just give it a wipe with a damp cloth? 
  
I know my car had a new roof about 6 months ago, and the drivers side seal looks like this (the passenger side looks fine) should it be concerned? 
  
 
  
And finally, do you have any tips for a new owner, things I might not have noticed etc? 
  
Thanks!