The problem with NOT including the “CG” is that in the chipguide, the “CG” is part of the number system. Copying/pasting from the chip guide becomes problematic if you have the hand edit every number you’re trying to share. In addition (I’ve mentioned this to Charles), when you go to paste a “CGXXXXXX” number in the chip search, the field is too short and it keeps the CG and 4 digits. I think the CG should always be included because it’s clear where the number came from, just as 4 digit numbers with N, V, E, D, and others denote IDs from TCR. Lastly, I don’t know if there are any chips that are less than 6 digits, but if so, omitting the CG creates leading zero (or lack thereof) issues.