I,m getting a ZKK (Brno)602 action with the push button peep sight made into a good custom gun. Is this action considered to be of good pedigree ,IE is it a genuine Mauser M98 design. I know it is functionaly very suitable for a big game rifle(458Lott) ,but would its humble brand name beginning ,limit its value as a top quality custom gun. Would big name builders(like Pete Grisel or Rigby for example) use a Brno action for the basis of a top quality rifle?