Ok, it's done for the 3 cars version :
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=747547099
I keep the old one and the two cars versions. I like them...

the two car one is an entirely different design, which looks like the Adtranz GT4/6/8N (https://en.wikipedia.org/wiki/ADtranz_low_floor_tram) . There is a similar design for Combinos too (Combino Supra; Avenio). However, with the "heads" you used, a 2-part tram is not possible (and doesn't make much sense anyways, since the revenue space is reduced on top of the wheels anyways...)

You can see "realistic" 3-part-Combinos in Melbourne, they look like https://en.wikipedia.org/wiki/D-class_Melbourne_tram . Also, they run in Erfurt and Nordhausen (single-ended (one-directional) version) and Nordhausen (double ended (bi-directional) version...

I just find a picture with the different sets possible. I'll try to make my models match with. There is no two cars.. but it's seems possible

it would look more realistic if you would take segment 2 or 4 of the 5-car-type as a middle segment...

Nice one, thank you mate ;)