The discussion of cracks in Campy hubs caught my interest because I have had two. Both were Record large flange and both were on the freewheel side. One was between two of the large holes and the other was from an inside hole to the outer edge through a spoke hole. Neither hub had been drilled out or modified. Both had been in 4-cross wheels. I am of normal weight and not particlarly hard on equipment except I tend to use it until it breaks or wears out. These hubs were purchased in the 60's and had 12,182 and 28,117 miles of use, respectively. I have had other failures like cracks between spoke holes of clincher rims (rear wheel, freewheel side): Super Champ Gentleman (12,443 mi) and Mavic MA2 (32,394 mi). I have had two steel frame failures one just recently on my 1966 Jack Taylor tandem (sad, sad, but hopefully local builder Terry Osell can fix it). Chapter 11 of my book You Started from Where? lists use, wear and, failure records from most of my 420,000 miles logged since 1958. I'll send a copy of that chapter to anyone who wants one and will pay my copying and postage costs of $4.00
Dave Siskind