Petr Kacha's site who I have helped in the past is using what he has, look at his 1945 findings for one......................totally a shambles and no where even close to completeness the JG 52 records are somewhat void even with Nikko Fast's huge volumes, we can only suspect, there may have been more confirmed or even less confirmed to Hartmann's score and his kameraden than we will ever know, same for Ost front kills by JG 51 and 54 and other Ost front LW units.