What brake pads do you use? If any

Ta for the advice, I went for Swisstop greens in the end.

adoubletap speaks the obvious truth, but I just used the pads that came in the shoes... I still regret it every-time my nose points downhill.

They maybe fine but what you're talking about is not!

Brake pads on Alloy rims pick up minute aluminium particles which get into the pad every time you brake. If you then run the same pad on a carbon rim those aluminium particles grind the carbon brake track every time you brake ..

Thanks for the heads up. The frequency with which I use my race wheels on the road bike is so low that swapping the pads is only a minor inconvenience. More common is training wheels on the TT bike but that's already moved into hibernation on the Turbo and won't emerge till spring - even so I'll bear this in mind! I bought the fancy kit when I had a job and now have to make sure I take extra special care of what I've got as there is no way I could replace it. Thanks!