Just fitted Dutch's Motorrad Concepts carbon mudguard. I got a "second" i.e. slightly imperfect model for £79.
It was a bit fiddly fitting it - front wheel in and out about 7 times. As it was a second, it had a slight twist in it so I had to play about with the supplied washers to get the fit correct.
A word of warning - the bolts holding the original mudguard on seem not to accurately match the threads in the fork brace. They are v.tight and uneven when unscrewing them. Great care & gentleness has to be taken when bolting the new carbon mudguard on as it is v.easy to cross thread them. I stripped the thread on one of the bolts, but luckily had a bunch of spare ones handy (they are the same diameter as 1200GS Tobinator bolts as it happens).
Also, on my mudguard, the recesses in the moulding that the bolts butt up against were not square with the fork brace, and the holes weren't in quite the right place. A bit of fiddling with a Dremel sorted out the holes, but it was a bit tricky getting the bolts tightened properly when they weren't mating squarely with the underside of the mudguard. Cue a bent bolt, replaced as before.
However, all this pales into insignificance once you see the finished fitted item. It looks really superb. I'm sure the proper (none seconds) items have a much better fit - my fault for being a tight git - but I'm v.impressed by the mudguard now it is securely fitted.
I now need a hugger to balance the rear and front of the bike properly!
Andy