Haha I wondered what was going off then
It's not a bad job to be honest, just takes abit of time! For the vents bit it has a grove which I followed around with my nail so I could see where it was, which you can see on the second pic then cut following the line, the worst bit is where the little dials are to open/close the vents haha. For the other bits I just cut tight up to the edge following the plastic, should probably have taken more pics!! My dad has a set of craft knifes which were bang on mate deffo recommend them, or use a Stanley knife/blade