The Elektor Forum will close. See also this link. From Friday March 1st it is no longer possible to log in to the forum. However, the content of the forum will remain visible until the end of March. As of April 1st the forum will definitely go off the air.
I don't think that there are special warranty rules for the wheelie. At löeast there is nothing to read like this Therefore the standard warranty rules will be effective as they are for all kind of products in my eyes. UK rules in UK, French rules in France, Dutch rules in the netherlands and so on...