David, every one of your points makes good sense and are well taken. Thanks very much.
Paul, its interesting to see that you would offer upgrades alongside the standard, not just to special order.
How important is it to know that the feed and housing are made by Bock as well I wonder? Is it just the nib that's important or (quite apart from the practicalities involved) is it acceptable to put a better nib on the existing feed and housing?