Thank you RVDT. The B2 I currently fly was once erm...something else, so I was aware it could be done, although might be a bit advanced for someone like myself to take on, but will look into it further. The problem with getting a B2 new at the moment is that there is a 25-27 month waiting list against a much shorter time for the B3 (this is what I was told my McAlpine). I hear what you say about the warranty, this had also crossed my mind as a potential plan.
Thanks to everyone for all their help and to those who have also PM'd me, it is great to get such varied independent opinions all of which have been very helpful
