First of all I installed a piece of tube to catch excess evaporating galden:
It has an extra hole in the bend for the thermocouple. I don't know what material that is but it shouldn't get too hot.
The next thing was the tube between chamber and chiller inlet, which allowed quite a lot of liquid galden to add up in the horizontal section near the chamber. Here are the old tube (above) and the new one (below), the inlet section to the left:
The new one is shorter and has an extra bent close to the chamber. This is how it looks when installed:
Much better than before!
And at last I have a small box for the heaters' terminal strip: