Record Collectors grading system was and is way too strict and inflexible, which is why people created their own gradings (++ etc). Also the RC grading system is NOT used by 99% of Northern Soul dealers, especially, as you say, the VG grade. VG has come to mean anything less than VG+, so people are grading G records as VG. I did start a grade of my own which was "completely f*cking knackered" but it never caught on.