Cutting the steerer is a normal part of setting up a new bike and I would not consider it a modification BUT then again if I were buying a used bike I would be asking how long the steerer is. A new rider who does not know these questions to ask would be much better suited buying from a respected dealer who can help guide them through the process and get them on the right bike. I am in the market for a handgun and I am a complete newbie. Ill be buying new as I don't yet know all the questions to ask to insure buying the proper one used.