You're right about Edgbaston vs WI. And I'd forgotten all about it; 173 overs across 2 and a bit days in 1995.
Get cricket scorecard of 3rd Test, ENG vs WI, West Indies tour of England 1995 at Edgbaston, Birmingham dated July 06 - 08, 1995.
www.espncricinfo.com
Of course, the test that was actually finished in 2 days was against the same opposition at Leeds, five years later.
That being said, I really don't think that accusation can be levelled at SA in this test. Maybe one or two exceptions, but most of the dismissals have not been down to being over-aggressive. Nor, for the most part, England, although some of them have been.