MFS obviously is having a slow day and has too much time on his hands ...
Clearly nobbyknownowt has some paperwork with this stuff on it .. how about scanning the sheets and emailing them to me and MFS .. at the moment the problem is a bit like trying to find something in a bag with a couple of sticks held in the hands ... while looking over one's shoulder using a mirror ....
If we had the original data, then there are likely to be some other clues to what the original derivation was ...