I agree that tunisia obi and chronicles obi are likely to be different variants.
(It means that it is not just reassembly after filming)
Certainly we have been deceived in various screenshots and pictures for a long time in the research of lightsaber,
so we have to be careful about the quality of photograph or light source etc.
But It seems like the tunisia upper grenade is too pitted as a cause of quality of photo.
And I also think there is contradiction in the position of the two transistors.
It seems that the left transistor of chronicles is higher than that of tunisia.
(Possibility that the position is misaligned by a unseen large drilled hole on clamp still remains.)
http://i1383.photobucket.com/albums...Chronicles vs Tunesiaoriginal_zpst5gpvov3.jpg
although it has nothing to do with it directly,
I have been worried about this treatment of saber in Tunisia.:cry
http://i1383.photobucket.com/albums...becc7d8a5014127a3a0ff4ff3c0_c_zps8awodpwc.jpg