I had a go myself! Bought the tools (£20 Mac tools). Cut the damaged windscreen out our Micra, took about an hour but worked.
Tried cutting the screen out a scrap Micra, broke it.
Tried cutting the screen out another scrap Micra, broke it too.
Tried again, got it. Took it back to the workshop, fitted it.
Fitted the trim, and broke it! LOL!
Found a self employed guy in Glasgow. Suppied and fitted one without breaking anything for £80 but we had removed our attempt 1st. £110 isnt bad at all!