Thanks!
This thing is a little Heath Robinson / Rube Goldberg as it is, or should I say 'hand-crafted', so I shall be amazed if it lasts a long time.
However, with a bit of TLC many of my ramshackle R&D items have done well, eg my SheevaPlug is coming up to it's fifth year, the experimental LiPOP4 battery is still hanging in there, etc, etc!
Rgds
Damon