Moin Motortalker, have seen on Youtube various video about the Kirovetz tractors–>http://www.youtube.com/watch?v=M4-UesAczhA sound and power are absolutely impressive….real Hevy Metal tools besides those normal tractors seem somehow filigree. Unfortunately I did not find much information about the models and the history of these power packs, often these tractors are for the Russian truckers in the mud or snow the last chance to free–> click who to the bolids with the cool sound what white writes here on mfg Andy