More Lancaster wreckage to ID

We have previously posted pictures here of wreckage from 625 Sqn Lancaster NG294 that crashed near the Bostalsee in Germany (Saarland) on 16 December 1944. Several forum members have provided us with good ID of most pictures. So here once again are more pictures from our latest visit. The electrical item has a Reference number of ’14a/3208 24 volts’. Another item shown seems to be a thermostatic valve or similar. The perforated copper plate could be from a flying helmet earphone perhaps? We also found a small brass plate (too small for picture) marked ‘SYNCH CONTROL’ with ‘R B’ underneath. We cannot find this control on the cockpit or engineer’s panels. Finally, we have absolutely no clue about the big heavy item that is very rusty and in poor condition. Thanks for help!

Dieter