Wouter,
We are all aware of the pro/cons of carbon vs aluminum. You dont have to remind us.

I dont think an aluminum i20 mast would be lighter than the current carbon one, it will be less expensive, but probably heavier. The wall thickness on the i20 mast is pretty thin, so its not like they are over engineering them.

If they use a domestic supplier, go with a wing mast, they will use less material and the mast will be better and cheaper.

Bill