As a slight ( well full) sidetrack from this thread, If anyone in the UK is in need of Roland repairs, I can wholeheartedly recommend EMS of Southend on Sea, Essex. who are an Authorised Roland dealer, although the phone number on Roland's site is incorrect.
I took my elderly FRX3 to them with an intermittent key not working and they knew instantly the problem.
The repair took 6 weeks purely due to the amount of work they had to get through but was completed 100%.
On collection, Mike told me that he had replaced a set of 4 contacts which were no longer available from Rolands but he happened to have some in stock.
I was also surprised and delighted at the extremely reasonable cost for the repair.
I would also like to add that Mike and Ian are extremely pleasant and approachable guys.
Obviously I have to other connection with this firm other than a very satisfied customer.