Dear Geoff,
I saw one in use at the MaryMarlborough Centre about 6 years ago. Tel: 01865 227600. Sorry that I can not offer more detail
Regards
 
Richard
 
Richard W Caley
Clinical Scientist for Rehabilitation
Medical Physics
Pinderfields Hospital
Wakefield, WF1 4DG
Tel:  01924  212234
Fax:  01924  214918
Email: [log in to unmask]