Haha thanks John
Thing is this - I forgot to mention in list of things done
When they had the gearbox off - they found that I had the earlier version of the gearbox.
So basically this meant that only 2 out of the 4 springs were serviceable in the gearbox
the other 2 were blocked up - I actually saw this for myself
seems the later design allowed the servicing of all 4 springs
I had the 2 springs that were servicable - replaced for new.
The old springs although hard to tell - looked ok ...
The adaptation was as far as I know a full one - as they used a specialist technician...
You mention GPT and GPT out of cal - what is that ?