Hey Phil,
I own a Gardan Horizon based in UK and I have to say I think it's a wonderful little aeroplane although I have to agree with Sir George, it does spend a bit of time in the hangar!!).
Have a look here ...
http://avionsgardan.free.fr/
for the French Gardan enthusiasts club. They are a fantastic source of information and parts.
Happy landings
3 point