Got my new bits and wondering how hard it would be to fit them myself? I'm pretty good at unbolting things and putting back on if I put my mind to it, but do I need any special tools? How about pushing the caliper pistons back in to allow for fitting the new (thicker) pads? Any tips like copper-easing also gratefully received. How long should it take? Shall I bite the bullet and just spend £50 at my local garage?