Thanks Gilly,
I gave it a try today. First of all, on the 928, there is no dipstick as such to check the level, there is a tank like a large brake fluid reservoir screwed to the side of the transmission. When cold the level was perfect, I took it for a good drive. Had to add just over 2 quarts to get it right!!
I adjusted the modulator by one full turn CCW. This gave me shifts slightly firmer than my W126, but still no where near as hard as it was! It would almost kick you in the back before.
Next task was the bowden cable. I was getting shifts at around 4k rpm under really light acceleration before (way too high, even for a sports car). Adjusted it longer, and got it spot on the first time. Shifts at just under 2k now. I'm glad it was right the first time, the adjustment is right in the valley of the engine under the intake plenum.

Regards,
Ben

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Ben

'85 500 SEL
'85 928S2
'88 560 SEC
'90 750i