Thermal shields and caps are ready. I cleaned them in ultra sonic bath with Isopropanol. They fit nicely to the mount.
The caps are teflon.
I'm think about how to wire the heater around the cavity. I'm reading Frank's entries in PSL:765,768 ,776,786, . Seems like I might need to drill a few holes on the shields for the wires. There are still more similar wire left. I'll calculate how long the wire has to be for heating the cavity up by 20 K.