How do you find your CD-ROM’s read offset?

There is a test routine included in EAC that will determine the offset for a drive using a library of predefined commercial CDs. It is important that you use exactly the same pressing as the creator, otherwise another offset could be occured on remastering. So you should at least receive twice the same offset on two individual CDs. If you have a Plextor 40X CD-ROM drive (or know somebody who owns one), you could even help to extend that database of included offset CDs to help others to determine the offsets. If this does not bring a good result, the last option is to ask the other persons in the mailing list if anybody already determined the offset for the specific CD-ROM drive model.