So, in between the rain and work I went out and changed the pulley. I don't have any pictures of the WIP but safe to say it was a total PITA, you have to basically undo the charger from the bracket and move it as far forward as possible to get the pulley off and even further to get the bigger one on!
So you guys that are thinking of running the 3.33 for a while just remember it might not come off as I had trouble with the 2.87 and 3.12 (only just managed to get it after 30 or so minutes of wriggling in different directions).
Anyway, this is the back of the 2.87 and it's done a proper number on the bracket which luckily isn't anywhere near the 3.12 pulley.
Went to take it for a test drive but typically it decided to rain and due to me currently having no wheel arch liner I had to turn back and crawl home at 5mph which was fun.
I also found out after a good look that my wing got bent out of shape and the paint got cracked where Jez had a little knock in my car, it just gets better and better.
The joy continues, oh well new bumper and wing repair next week.