I believe you appreciate my desire for them to be answered.
I understand the desire. But I am not sure that I understand the importance (to the case) of having answers to your questions.
The importance of CE142 is that it links Oswald to the scene of the crime (the SN). It was claimed to have contained a rifle belonging to accused (CE139) that was claimed to be used in the crime. Furthermore the rifle was claimed to be stored inside a blanked in the Paine's garage in Irving. The assumption was that Oswald returned to the Paine's on the evening of the day before the crime to collect the rifle.
The bag was determined to be constructed from materials available from the TSBD first floor wrapping area. It is the key piece of evidence that links Oswald and the rifle to the scene. It also indicates intent on his part as it could be argued he constructed it for the purpose of transporting the rifle the following morning.