don’t forget the age of the original group this is designed off, these groups have been modified to be more ‘modern’ but some things would take a whole re design of the internal sleeve again.
you could in theory have the screen be part of the blank sleeve of the safety system and do away with the center screw and ims screen altogether.
btw im not debating cost - you want high quality parts made, then they cost - thats simple im debating the need for it, thats all.