[5] On December 31, 2005, MPK Poznań – the public transport operator that previously modernized the trams by itself – created subsidiary company called Modertrans Poznań on the basis of Bus Repair Company in Biskupice (Polish: Zakład Napraw Autobusów w Biskupicach).

[6] The Moderus Alfa trams are created through sophisticated modernization of old vehicles of Konstal 105N/105Na generation.

[14] On July 30, 2012, Tramwaje Śląskie signed a contract with Modertrans and MPK-Łódź consortium for modernizing 45 units of 105Na trams and delivering parts for modernizing another 30 units that was planned to happen in Repair and Service Department of Tramwaje Śląskie (Polish: Zakład Usługowo Remontowy Tramwajów Śląskich, ZUR).

[11][18] In 2008 Tramwaje Szczecińskie bought two bodies of HF 09 trams, that were equipped in local workshops.

[20] In total, Tramwaje Szczecińskie bought 7 compositions of two Moderus Alfa streetcars that were assigned to Golęcin depot.

4 units were paid with the operator's own funds and 10 remaining as part of co-financing from the European Union.