Yeah C4 - you are right ... I remember landing at Nkosi Sekella Airport soon afterwards with a Citation and the guys showed towards a koppie where 'ol Hammos met his fate.
He was a great guy by the way ... had some good laughs (and LOTS Doppe ) with him.
I have searched everywhere my friend.
Now mailed a friend that is an engineer a the dam to get more clarity or a name for you.
Cheers and best regards,
Gunsss