I finally have got the BT version of my favourite keyboard. I am pleased to report, at this early stage, it is exactly what I wanted. Sure its not a type S but Mr Hypersphere will be able to lend a hand in this regard. The BT works very smoothly, I can see almost no difference between the wired and wireless versions. The battery life (published) is meant to be very good, but I'll report back in due course. Interesting to note, it did not like my Sanyo Eneloops, I got an orange light upon insertion versus a blue light, with the factory supplied Fujitsu ones.
I travel a fair bit for work now and this will be my companion on the German trains, until I got told off.
I hope in the future PFU release a white casing, I think its nicer than the black.
Now I have the difficult task of parting with my wired unit

Advert to follow.