It is always worth remembering that when you are geared up for quantity production (note quantity and not quality as I will mention MG cars in a second!) a production change, even to something APPARENTLY much simpler is always a challenge as it always means upsetting of ceasing or changing or altering something and ALWAYS at considerable cost too. So if your lines are running smoothly then it's best to leave it alone or, as in the Bren gun, change something a bit at a time over many many months.

MG and other bodyshells produced at PSF Swindon where I spent a month or so during the production engineering phase are a good example of this. Just to change from the earliest tailgates with multiple press-punched holes for the MGB/octagon/MG/GT to a three hole MGB-GT fixing cost many thousands and thousands of £££'s in press tool jig fixtures and line changes. Another apparently simple example during the same changeover period was abandoned simply on cost grounds and that anomaly remained.......