| 2025-04-30 21:24:24 | menace | Updated Kostek's membership of Royal: set as ex-member |
| 2025-04-30 21:24:16 | menace | Added Kostek as a member of Intensity |
| 2021-11-06 22:15:34 | dipswitch | Added Kostek as staff member of Electronic Confusion |
| 2021-05-30 06:26:34 | menace | Added credit for Kostek on Poltergeist: Code (crack) |
| 2019-07-13 06:38:46 | Brittle | Updated Kostek's membership of iNSANE: changed group to iNSANE, set as ex-member |
| 2014-07-31 05:52:57 | menace | Added credit for Kostek on Wacus POLISH: Code (crack) |
| 2012-06-24 12:05:49 | menace | Set location to Poland |