16 quid isn't bad at all, I thought they normally charge you 25 quid for an admin fee for looking at it, then the extra cost of the tax itself! Well I normally get stung like that!
Looking good though mate, oh and also for the inlet, get a thermal inlet gasket from ferriday, as those inlets get hot without one even when the car is moving. Just make sure you don't have an egr valve.
My charger is the larger C38 one, which one I'm not sure of though lol