Greets from Wuppertal now, where its famous ´Schwebebahn´ was also hitting a problem 1 hr ago-technical problems, no service.
Well, just yesterday I received my copy of BS= Blickpunkt Strassenbahn, a 2-monthly thick german tramway-oriented mag.
About Wolterdorf it states all 3 new Moderus Gamma trams have been received, BUT the official ´Zulassung´ frm the traffic supervisors (official admission) will not happen before late summer. The school hols in this ´land´ last till 30/1 aug, so all in all I guess you have a good chance to still the old cars running.
Burocracy (buro-crazyness) as you know is a very big thing here in Deutschland, esp with all things even remotely tied to some govmt. branch.
BS also comments that with new buses this process goes much, much faster.