I have two Kawecos, one aluminum and one plastic. The only thing I would caution is that the converter holds a very small amount of ink, due to the compact nature of the pen design when capped. I turned the plastic one into an eyedropper with some silicon grease and it is a dream: holds tons of ink. This steel one will do fine as an eyedropper as well which is a big feature IMO. Plus you don't have to spend for the converter.
(I'm stuck with the small capacity converter on the aluminum one; can't eyedropper it.)
(I'm stuck with the small capacity converter on the aluminum one; can't eyedropper it.)