From the numbers I can find it seems as if the coffer is just less than half an inch wider than the lowest point of the AP. Since the rest of the passages seem to be tailor-made for the sarcophagus to pass through (the DP, the majority of the AP, and the passages leading to the KC) is it possible that the lower AP was finished last, just prior to releasing the plug blocks? It would make sense from a labor stand-point to offer a larger tunnel during construction and block it up on the way out. John, you're the expert on the weird-ass AP stone-work- do you see anything that could imply this?