Copper seat has long been bottomed out due to over torque and gazillions of cycles etc.  The resulting air leak into the RGA volume when the chamber is vented necessitates frequent baking of the RGA volume.  This then requires that the electronics module be removed and reinstalled.  These repeated re-installations of the electronics module along with the associated "hit or miss" alignment of the feed-through pins and sockets has caused the sockets to recess into their connector etc. etc. etc. Postponing fixing one problem is soon to result in a 2nd, avoidable, problem.