Hi folks, I'm trying to decide wether or not to buy a 'spare' wheel for a C-HR Excel I've ordered.  I've heard it takes up extra space and raises the base of the boot. Has anyone any experience of this, if so could you give some indication of cost and if you think I'm 'worrying' too much as I've never used one of the nowadays standard 'temporary repair kits' which seem to be included with every car! Is the addition made at the factory or via the 'supplier \ garage' and does it need to