There is a debate going on in my company about whether or not to modify the SBC cubes. One suggestion is if it is necessary to modify them, copy them to create a custom cube and modify that, keeping the SBC in tact for future reference or use (recommended R/3 practice) and others say that doesn't make sense, just modify the SBC cubes-stay away form creating custom cubes.
Is there a strong opinion out there to do one or the other?