hard riderYou would come to the conclusion that the Langer...

hard rider

You would come to the conclusion that the Langer Heinrich depoist (1978) only had about 100 times the ore reserve at similar concentrations of Uranium Oxide. If your calculation of 1 tonne for Hakskeen is correct then Langer Heinrich deposit only has 100tonnes, and apparently much defined in 1978. Exploration of Langer Heinrich has proven a much more substantial reserve capable of supporting a mining operation of 1,000+ tonnes/annum of Uraniium for many years.

I take this to mean the old 1978 report is of little use other than to indicate that Uranium is present.

One also might observe that in the 1978 report there are several occurances near to Hakskeen at Arandis and Klein Spitzkuppe and Klein Trekkopje, the latter considered to be an extention of Hakskeen.
The first two appear to be in the Reefton exploration area as well as does part of the third.

Ore reserves of the Klein Trekkopje occurrence are some one 1000 times the Hakskeen reserve (1978). The Arandis occurance was not investigated sufficiently to indicate a reserve. The Klein Spitzkoppe
Deposit has 10 times the reserve (1978) of Hakskeen.

I take it from the above their is significant potential for RTM to make a find of some substance.