Thinking about buying a Nissan GTR
 

Hi Guys, I've found a Nissan GTR for £52k and a friend of mine said his mechanic will make a few modifications to if for me.

But here's my concern. I'm worried about insurance, I've been screwed over before where I had modifications and they didn't pay for my repairs.
I'm looking at Keith Michaels' GTR insurance and they've quoted me £480 which is good, but I'm not sure what they would be like if I had to claim.

Has anyone used them before? How do they handle claims? and what are they like for modification half way through a policy?