well i know one of the reasons beakie (MKVI) gave way to aquila (MK VII) is because it was hurriedly consturcted towards the end of the heresy. aquila then gave way to the high gorget (collar) of the MK VIII errant armour
heres a link to more detail regarding armour variants:
here
when i read the title of the thread i wasnt sure what to expect... beakie head fluff. sounds like chef brian to me.
