Finally got the seats finished with the great help of Thomas from Switzerland.
We pulled the seats apart and just swapped the seat bases by airmail.

This was the simplest and easiest fix even though the freight was quite expensive.
So, a long drawn out exercise that need not have occurred, except for the incompetence of the worst supplier that I have dealt with so far.
I am just about to start testing the 120Volt 400hz. power supply to get the electrics working on the seat motors. That should make getting in and out of the seats a lot easier.
Cheers.....................Brian W.