Unfortunately this is over 2 years ago (maybe 3) so its a lot different now.
Also, for anybody who is putting on a roof spoiler and hasn't done so already. Drill a couple of breather holes in the metal of the roof through to just inside the roof lining. This is so any moisture that forms inside the fibreglass cavity can escape or evaporate over time. Other wise you will end up with trapped moisture and eventually rust. I learnt the hard way. we had to cut away the outer corners and the front section of the spoiler and try and treat the rust inside. I drilled breather holes while I was at it.
It would have been good to have mechanical knowledge.
Mental note to self: next life, get mechanical knowledge.