Thank you Gary, I did my best in order to take good photos.
I used a cheapie soldering iron and a small desktop vise. I bought that iron for the equivalent of ca. 75 USD. It was not used for two or three years and I have just realized that the tip is heavily corroded, so it is really time to get new spare parts…
It would have been better to use the professional equipment at work, but I was too lazy to pack everything and spend time there after normal hours. (I work as engineer in the electronics industry)
Luckily I have decent soldering skills, so I managed to do it with my old iron as well.
However, I can barely see any difference between the soldered and glued parts after painting the rails. ( I soldered only the straight parts, not the curved ones in the front)
The tricky thing was to keep everything together while soldering. That’s why I needed that small vise. I made a few test parts, when I tried to hold the parts with a tweezer, but the superglue joint broke all the time because of the heat.