Got some new Zipp 404s tubulars. I'll mount the zipp pads on my campy brakes. Here's my question - should I have a second set of regular pads mounted on brake pad holders to swap out for when I use my regular aluminum rim training wheels and then switch back for every race where I use the Zipps or can I get away with just using the carbon pads all the time? I've heard people take both sides on this one. I know I don't feel like switching them out and shelling out another $50 bucks for 4 campy brake pad holders but if it saves my insanely expensive Zipps then it is worth it. If I just need to clean the pads every time I mount the Zipps, what do you recommend to do that - acetone? Thanks.