I am curious about the sizing of the sloping frames from Colnago. I currently ride a Trek Madones sl in a size 56. The top tube length is 56cm. The geometry on the Colnago site states that a sloping 56 has a 56.8cm top tube yet the reference chart next to the sloping chart makes it look comparable to a 60cm standard. The 60cm has a top tube length of 58cm. Should I just be concerned with the top tube length of the sloping frame or is this frame going to be too big. I know if it is comparable to a 60cm it will be too big. Any help from those with knowledge of the colnago sizing would be greatly appreciated. Thanks, Matt.