Thank you for posting, I had no idea this was addressed (long overdue) after Reisner's brief mention(s)... This is a big reason why I believe the Queens chamber inside G1 belongs to an earlier construct...the physical evidence partially resides in the northern chronology of "3" variants in wall construction visible in the horizontal passage leading to the chamber; particular that these variants occur on the same elevation makes the passage after the step to be add-ons rather than all the same original placement.

If you want I would be happy to work with you to develop the chamber's evolution...

All the best,

B.A.Hokom