Yep, so have I now. Just one solitary one, on a No5 no less. The thing now is to find out when it was authorised to use standard No4 blades and/or when the angled blades were made obsolescent or obsolete. From a production engineering point of view, the angled blade would certainly be easier to produce.

Anyone care to show a pic of the original No5 angled foresight blade?