European sycamore is a different type of tree, and the wood is rather like maple. Often curly, looks like maple, people use it some, but I think it's usually kinda soft too, as I understand it.
And I agree, if it is not a "normal" stock wood (maple, walnut, cherry, ash, beech, birch) it means that someone has already tried it and failed!
There are other good American woods out there, that might make a good stock... if you could get a piece large enough. Stuff like Hornbeam or Hophornbeam, or Mulberry or some others might be strong, hard, stable wood, but the trees just don't generally grow very big.